Post Mortem | The Unusual Shooting of Alex Pennig

12 Aug 2025 · 24 min · 11 chapters

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In short

This Post Mortem episode examines the death of Alex Pennig, last seen alive by former co-worker Matthew Ecker, with whom she had a one-time affair. Ecker called 911 saying she shot herself with his gun, but investigators found inconsistencies.

Guests

Natalie Morales (CBS News correspondent) and Betsy Shuler (48 Hours producer). They discuss claims about Ecker’s grief (first responders and detectives questioned whether he produced real tears), the gun’s placement (Alex found with gun on shoulder; detectives noted her left hand had gunshot residue while Ecker had none), and Ecker’s delayed admission that he moved the gun (after two hours). Notable examples include body-cam footage, surveillance showing Alex texting before death, and the inability to access her phone. Ecker was convicted and sentenced to 30 years; he’s appealing.

Written by AI. May contain mistakes. Listen to the episode to check what was said.

Chapters

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Introducing the Case of Alex Pennig

0:30 to 1:27

Overview of the mysterious circumstances surrounding Alex Pennig's death.

“Welcome back to another episode of Post Mortem.”

First Responders' Observations

1:27 to 2:29

Discussion on the reactions of first responders to Matthew Ecker's behavior.

“It's a great title because it was a strange one.”

Analyzing Grief Responses

2:29 to 4:25

Exploration of different ways individuals process grief and its implications.

“It was interesting when we questioned them about what they thought.”

Evidence and Suspicion

4:25 to 7:11

Examination of the evidence surrounding Alex's death and Ecker's behavior.

“So there was a lot of things at play there, you know, and for our viewers who just watched this episode, they might remember that we also show someone else responding to grief.”

Conflicting Accounts of the Incident

7:11 to 9:09

Discussion about the inconsistencies in Ecker's account of the events.

“Matthew Ecker also didn't give detectives the whole story about the gun at first.”

The Position of the Body

9:09 to 10:28

Investigating the significance of Alex's body position at the scene.

“And so, you know, Natalie laid out the one side of it.”

Interviewing Shane Anderson

10:28 to 11:48

Insights from Shane Anderson about his relationship with Alex.

“So again, one more thing that makes us very conflicted.”

Matthew Ecker's Involvement

11:48 to 14:00

Exploration of Matthew Ecker's complicated relationship with Alex.

“To me, it appears as if he, you know, truly loved Alex, but it also seemed like, you know, it wasn't the best relationship or I should say it wasn't perfect.”

Motive Behind Alex's Murder

14:00 to 16:34

Explore the complex motives and unanswered questions surrounding Alex's murder.

“So with that, he is able to prescribe medications.”

Ecker's Conviction and Family Reactions

16:34 to 18:50

Discuss the aftermath of Ecker's conviction and the differing perspectives of both families.

“His family was not happy with how the trial was presented and how it went on.”
Show all 11 chapters

The Grief of Two Families

18:50 to 19:49

Reflect on the profound grief experienced by both the Pennig and Ecker families.

“Alex's family and friends totally convinced that he's guilty.”
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Transcript

Automatic transcript. May contain errors.

0:00Natalie Morales:Before we jump into today's episode, just a reminder, you can watch the video versions of 48 Hours Postmortem on YouTube and now streaming on Netflix. Go deeper with a behind-the-scenes perspective and in-depth conversations with the correspondents who were there. Watch on YouTube or stream on Netflix.

0:30Natalie Morales:Welcome back to another episode of Post Mortem. I'm your host, Anne-Marie Green. And today we're discussing the death of Alex Pennig. She was last seen alive by her former co-worker, Matthew Ecker, with whom she also had a one-time affair. Now, he called 911 after he said she shot herself with his gun. But investigators would unravel a different story. So with me now to discuss this mysterious case, CBS News correspondent Natalie Morales and 48 Hours producer Betsy Shuler. Thank you so much for joining us, guys. Of course. Thanks for having us. Good to be with you again, Anne-Marie. If you have not listened to the 48 Hours episode that we're about to talk about yet, you can find the full audio version just below this episode in your podcast feed.

1:17Natalie Morales:So go take a listen and then come on back for this conversation. All right. So the title of this episode is The Strange Shooting of Alex Penning. It's a great title because it was a strange one. And this was one hour where I found myself completely convinced of a different scenario every five seconds. One of the things that I was watching is Matthew Ecker's reaction. He was certainly incredibly distraught. He was breaking down, but I couldn't tell if I thought it was too much or not. You interviewed the first responders. What was their impression of Ecker when they spoke to him? You know, I think that's what was so fascinating is that we had so much of that body cam footage.

2:01First responders were with him for about an hour, and that's what everybody was looking at and analyzing. And it's not just the amount of footage, but it's also that it's minutes right after Alex was shot. I think people enter a situation and look at things and say, okay, does it seem genuine? Does it not seem genuine? And I think first responders analyze all the evidence in front of them as he was very distraught and grieving and trying to process the trauma in that moment. It was interesting when we questioned them about what they thought. They thought he was not producing real tears and they questioned how he was responding to what they perceive as real grief versus, you know, not grieving.

2:48And I think, you know, throughout the course of our reporting, we look back at that footage so much, right, Betsy? And we just analyzed and overanalyzed and we thought of all the different scenarios. And it's really hard to decipher how somebody processes grief is what we've come down to. Yeah.

3:06Natalie Morales:Yeah, for sure. I mean, I think our impression of the footage is one thing, but the way the people involved with the case sort of saw the footage is a different thing. Detectives noticed Ecker talking to first responders in the hallway. He seemed really emotional, but they didn't see him crying any actual tears. And I think that stood out to them. All of this was what ended up in trial being questioned, his behavior, whether or not he produced real tears. And also for Alex's family, right, they're looking at this footage and they see a guy who's disingenuous, who's overacting, who looked rehearsed to them.

3:46Natalie Morales:Matthew's family sees, you know, their their son, their brother breaking down. His mom is a nurse and had worked as a hospice nurse for a while. So she said she had some experience dealing with people going through trauma. And she said that in her experience that people don't always produce tears. And also that sometimes when you're crying for that long, you might not produce tears the whole time. If you're dehydrated, you may not produce tears. You know, in that scenario, Matthew had been drinking for hours with Alex. So there was a lot of things at play there, you know, and for our viewers who just watched this episode, they might remember that we also show someone else responding to grief.

4:37Natalie Morales:We show the moment where Shane Anderson learns that his girlfriend, Alex, had just died and he doesn't produce tears either. You know, so I found that really interesting. Yeah, that did stand out to me. You know, early on as the hours unfolding, I started to wonder, well, I don't know. What is the right way to respond to this terrible, shocking news? So, yeah, like I said, I went back and forth about a million times during the hour. So speaking of conflicting evidence, first responders found Alex dead in her bathroom with the gun laying on her shoulder. Her left hand was sort of resting on top.

5:18Natalie Morales:The detectives later learned that she was right handed. Did detectives think that this was a slam dunk in terms of evidence that she could not have been the one to shoot herself? Because why would you use your non-dominant hand? I mean, I definitely think they thought it was a piece of the puzzle. I'm not sure it was a slam dunk at that point. For us, this one was really hard. I think we go back and forth on what this means. You know, initially you think, oh, well, if she's right handed, how could she use her left hand? And one of the editors on this, interestingly enough, is in the military. And she had an interesting perspective.

6:03Natalie Morales:If you picture a pistol, when you go to rack the chamber, you pull back this sliding mechanism to load it. And apparently that's really heavy and not so easy to move if you don't know what you're doing. So it could make sense that you would make that motion with your dominant hand, which means the gun would be in your non-dominant hand. And according to Alex's family, Alex did not have any experience with shooting guns. Mm-hmm. And remember, according to Ecker, this all happened so quickly. He says she ran into the bathroom, locked the door, and then he heard a gunshot. And then when he broke down the door, what he saw was her on the floor.

6:51It's according to Ecker. So I think that's like a split second thing that you have to consider timing, time to switch hands. Also, let's say she has her hand on the door and is locking the door. Wouldn't you do that with your dominant hand? I mean, it's hard to say what somebody does with the left and the right. But obviously, if you're in the moment and in a frenzy, I think it could be seen differently.

7:16Natalie Morales:Right. Right. Matthew Ecker also didn't give detectives the whole story about the gun at first. It was more than two hours actually into his interview that he admitted to moving it, first putting it in his suitcase, and then he placed it back on Alex's body. That's what he says. Did detectives think, you know, this was suspicious, that this perhaps showed a bit of guilt? Yeah, that's exactly what they thought. One of the detectives was like, what innocent person would do this. I mean, I think that was a really big moment for them. If you didn't fire the gun, why would you pick it up and move it?

7:55Natalie Morales:So that one didn't look good for him. And the explanation that Eckers' attorney gives was, you know, in that moment realized, oh my gosh, that's my gun. And so maybe there was a panic or something and he picked up the gun and went to put it away, but then realized, well, I've got to explain what happened here. I better put it back. So, you know, that's how Bruce Rivers, who is Ecker's attorney, explained that at trial. So you can look at this from two different sides again and be very conflicted, as we all are. But as a viewer of true crime, you know, when someone starts changing their story, your spidey sense goes up.

8:31Natalie Morales:That's your tell. Yeah, especially after two hours, because, you know, he's been questioned about the positioning of the gun probably a couple of times. It comes off like he's thinking, I better have a better answer than the one I had an hour ago. Also, the gunshot residue was actually on Alex's left hand. But Ecker didn't have any gunshot residue at all on him. And keep in mind, he had no blood on him. His entire shirt, outfit, everything was clean. You know, he doesn't have anything to indicate that he was near her body at the time. No, which is really interesting. And so, you know, Natalie laid out the one side of it.

9:13Natalie Morales:The detectives would say that, you know, that would be because the door would have shielded him, that they believe there was a struggle at the bathroom door and she was trying to push the door closed and he was trying to reach around so he would have been shielded from some of that. You know, I think that's what's so interesting about this case is you try to add up all the pieces and the position of her body in the bathroom was a big one. That was a big tell. Yeah, I think that was one of the first things for the detectives that sort of made them a little suspicious about the scene. Just seeing the position of her legs, they were like, how could she have gotten in this position?

9:52When first responders arrived there, her legs were straddled around the door. And that, according to the scenarios that were presented by detectives, they were like, well, that shows that there had to have been some sort of struggle, you know, that she was sort of caught in the middle of the door when this happened. whereas Ecker's attorney explains that as he was trying to help her, he went in, broke the door, there was enough room in the bathroom that her legs could have shifted and moved with the door being pushed back and opened. So again, one more thing that makes us very conflicted.

10:42Natalie Morales:Welcome back. Matthew Eckert claims that he went to Alex's apartment that day because she told him that she was scared of her boyfriend, Shane. Shane was never considered a suspect, though. You interviewed him in that hour. What was your impression of him? Well, I have to tell you, first of all, he was very reluctant to do the interview with us. And he was hesitant. He was very unsure about what to expect. I think many of his reasons for deciding to do it was he wanted to honor Alex, who he loved very much. But also he was, I think, still processing a lot of what he had heard. I mean, a lot of what he was first hearing happened to come out of the trial.

11:29And the first time he was hearing, for example, that Matthew Ecker and Alex had had a previous romance affair was at that trial. So I think talking to us gave him some sort of sense of, you know, closure, but also wanting to be able to process his emotions.

11:48Natalie Morales:To me, it appears as if he, you know, truly loved Alex, but it also seemed like, you know, it wasn't the best relationship or I should say it wasn't perfect. He was accused of doing some stuff to Alex that she was scared enough to call this other guy, Ecker. So, you know, he was brought into this through that. He wasn't a suspect, but I think he also wanted the chance to respond to some of that and tell his side of the story. He says, I mean, Alex was the love of his life and they were planning a future together. In fact, it was right before the holidays when Alex died and he was planning to go with her to meet her parents for the first time.

12:29So he was looking forward to that. Yeah.

12:32Natalie Morales:It did seem like he really cared about her. Even all these months later, we could feel it when we were with him. You do certainly get that in the hour. And I just want to stress to everyone, even though it's clear in the hour, he was never considered a suspect at all. After that altercation at the bar, he was told to get out and go home. And that's what he did. Yeah. There were only two people in that apartment. It was Ecker and it was Alex. Yeah. Speaking of Ecker and Alex, pretty unusual relationship. That day, he made a three hour drive from his home to help Alex get out of what he says is, you know, a bad situation with her current boyfriend.

13:14Natalie Morales:When I heard it in the hour, I go, wait a minute, there's no one else that's closer to you. I mean, in three hours, an argument flares up and then it's over. It just seemed a little a little off. Was the affair truly over? According to his family, the affair had ended and they were just friends. Seemed like a bit of an interesting friendship because he was giving her money. As we see in the trial and court records showed, he was financially helping support Alex paying her rent and pay some of her expenses, about$28 ,000 that he ended up giving Alex or loaning Alex. He was also, according to the text messages that we see between the two of them, prescribing her with drugs.

14:02Ecker is a licensed nurse practitioner. So with that, he is able to prescribe medications. Alex, of course, was not his patient. And while detectives and even Ecker's own family, who are also nurses, all agree it is unethical, they all point out it is not illegal.

14:24Natalie Morales:Ecker really did seem to care about Alex. And so the big question, of course, is what could the motive have been here? Yes. I mean, certainly when you talk about motive, I mean, what could have been the motive for murdering Alex? I think that's probably the most mysterious part of this case and something that is still not very clear. I mean, one thing that detectives thought it could be was that perhaps maybe Alex was threatening to go public and to tell his wife even about their affair. But then there's that question of why would she do that to the guy who was providing for her at that time? What about the phone?

15:03Natalie Morales:What about the text messages? It was clear in the lobby of the apartment building that she was looking at her phone. Yeah. You know, we saw that surveillance footage and that's the last time you see Alex alive. It looked like she was texting with somebody, but we don't really know if there were text messages or not because police were never able to get into her phone. Detectives did tell us that multiple forensic examiners did try to get into Alex's phone, but they were unsuccessful. The defense also tried as well. It would have been really revealing to be able to see some of her text messages.

15:40Natalie Morales:You know, we have the messages between her and Ecker from Ecker's phone. We go through some of those in the hour and I think they're very telling, but we don't know who else she may have been messaging and what she may have been saying to them. Some people wonder if she was messaging with Shane. You know, this fight at Camp Bar had just happened, but Shane had lost his phone, so they weren't able to get the messages from his side either. So yeah, there's a lot that we don't know that maybe could have come out if they would have been able to get in the phone. When I talked to Shane, I asked him, like, did you ever, I mean, if you sign onto a computer, you can see your messages or, you know, if you, you know, can you check Facebook messages?

16:25And he said there was nothing.

16:27Natalie Morales:Yeah, he told us he was not messaging with Alex at all. Ultimately, Ecker is found guilty. He's sentenced to 30 years. It's a hefty sentence. is he appealing his conviction? Yes, he is appealing his conviction. His family was not happy with how the trial was presented and how it went on. What was it that they were unhappy about? So there were a couple of things, obviously the outcome. You know, their son, their brother is in prison for 30 years, but they would have liked to hear Ecker on the stand. They would have liked him to tell his story. His defense attorney, Bruce Rivers said that, you know, through all the footage in the hallway, in the interrogation room, that he did get to tell his story.

17:16Natalie Morales:So Rivers told us that he didn't feel like it was necessary for Ecker to testify. um you know i think the family also felt that his you know his character wasn't brought into it the way he helps people his past some more sides of his personality like that i think they really hoped that that would have been a part of it i sort of wondered about that because i thought the way they describe him there are some things at odds with that you know he he runs to the aid of this young woman, but it's still sort of questionable. I think that's why ultimately his attorney decided, you know, is the risk worth taking, putting the defendant on the stand?

17:57I think that's always the analysis you do. Here's a guy who has a wife with four children and knowingly he cheated on her. Granted, an affair does not make a murderer, as we've talked about so many times in our 48 Hours shows. We know that's not the case. Right.

18:16Natalie Morales:I was kind of curious about how Alex's family felt about how she had been depicted. Her parents knew she had some struggles. She had some things in her past and they really didn't shy away from it. They certainly didn't shy away from it in our interview. And I respected that. I mean, it's who she was. And they're wonderful people, the Pennigs, and still dealing with so much grief and losing Alex. Alex was a beautiful person and they wanted to make sure that her memory was honored. Ecker's family totally convinced that he's innocent. Alex's family and friends totally convinced that he's guilty.

18:58Natalie Morales:You have to present this hour. How challenging was it to strike a balance? I think it's always a challenge, but sort of also always a part of our job. And part of what we do as journalists is to present both sides. I mean, it doesn't change a fact that a jury found him guilty, but I think that is a part of our responsibility that we take really seriously. Yeah. And we walk away from this one seeing two families that are destroyed. One lost their daughter, who they adored and had been through so much with her. And the other family is grieving the son sentenced to 30 years in prison. I think you see both sides here of two families that are grieving a loss.

19:44And I think that's what our reporting shows is it's never easy to tell these stories, but we do our jobs and present all the evidence. And ultimately, you know, it's what the jury came back with. And we'll have to see what happens next.

20:00Natalie Morales:Yeah. Well, thank you guys for another really fascinating episode. I'm sure viewers are still debating about how they feel about the outcome of this case. Um, Natalie, Betsy, just want to thank you. Of course. Thank you. Thank you. Natalie, you have a brand new podcast that's dropping. I'm hosting a new six episode podcast. It's called 48 Hours NCIS. It takes listeners inside the case of Erin Corwin. This is a tough one. She was a 19 year old Marine wife found dead in an abandoned mine shaft in Joshua Tree National Park. we go behind the scenes with the real life NCIS agents as they worked through the case and their tireless efforts to try to locate the body.

20:46Then finally, ultimately reaching the conclusion of that case and the verdict. So be sure to pull up your podcast app where you're listening, type in 48 hours NCIS and tap follow to check out our new episode. New episodes come out by the way, every Tuesday. So you don't want to miss it.

21:05Natalie Morales:So you know what else comes out on Tuesdays? Postmortem. And if you like this series, Postmortem, please rate and review 48 Hours on Apple Podcasts and follow 48 Hours wherever you get your podcasts. You can also listen ad-free on Amazon Music, Wondery Plus in the Wondery app, or with a 48 Hours Plus subscription on Apple Podcasts. Thanks again for listening.

From the publisher

CBS News Correspondent Natalie Morales and 48 Hours Producer Betsy Shuller go behind their report on the murder of Alex Pennig. When Alex was discovered dead in her bathroom her friend, Matthew Ecker, called 9-1-1 and claimed she shot herself, but detectives uncovered a different story. This episode last aired on 10/29/24.

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