True Crime with Kendall Rae
True Crime with Kendall Rae
January 13, 2026

Killed By Her Ex-Lover After Confrontation With New Boyfriend?! The Case Of Alex Pennig

Quick Read

The mysterious death of nurse Alex Pennig, initially reported as a suicide by her married ex-lover Matthew Ecker, unravels into a complex murder investigation marked by his inconsistent statements, forensic discrepancies, and a controversial guilty verdict.
Matthew Ecker's 911 call reporting Alex Pennig's suicide was contradicted by forensic evidence, including a dry sink, clean gun, and dried blood.
Alex, a right-handed individual, had a gunshot wound to her left temple, with gunshot residue on her left hand but no blood on the gun or her hands.
A broken door lock found under Alex's body suggested the bathroom door was forced open while she was standing, challenging Ecker's narrative.

Summary

Alexandra 'Alex' Pennig, a 32-year-old nurse with a history of overcoming addiction, was found dead from a gunshot wound in her St. Paul apartment. Her ex-lover, Matthew Ecker, who was married with four children, called 911, claiming she shot herself. Ecker's initial account quickly crumbled under police scrutiny due to numerous inconsistencies: a dry bathroom sink despite his claim of washing bloody hands, a spotless gun, dried blood around Alex's body suggesting a longer delay, and Alex's body position inconsistent with a self-inflicted wound after the door was broken. Further complicating his story, Alex was right-handed but sustained a left-temple wound, and Ecker later admitted to moving the gun. Security footage showed a tense interaction between Alex and Ecker shortly before her death. Investigators also discovered Ecker had been unethically prescribing Alex medications despite her addiction history. A crucial piece of evidence—a metal locking mechanism from the bathroom door found under Alex's body—suggested the door was broken while she was standing, not after she fell. This led to a theory that Ecker broke in and shot her, explaining the lack of blood spatter on her hands and the clean gun. Despite the medical examiner ruling the manner of death 'undetermined,' Ecker was found guilty of second-degree murder in April 2024 and sentenced to 30 years, a verdict that remains contentious.
This case highlights the critical role of forensic evidence and detailed police questioning in uncovering the truth behind suspicious deaths, especially when initial accounts are misleading. It also underscores the ethical complexities in professional relationships and the challenges of achieving definitive justice when direct evidence of intent or a clear motive is absent.

Takeaways

  • Alex Pennig, a 32-year-old nurse, died from a gunshot wound in her apartment, initially reported as suicide by her married ex-lover, Matthew Ecker.
  • Ecker's account was riddled with inconsistencies: claiming to wash bloody hands in a dry sink, a spotless gun, and blood around Alex's body that was already drying.
  • Alex was right-handed, but the wound was to her left temple, and the gun was found near her left hand, which had gunshot residue but no blood.
  • Security footage showed a visibly annoyed Alex and Matthew returning to her apartment just 20 minutes before the 911 call.
  • A crucial piece of evidence was a broken door lock mechanism found under Alex's body, indicating the door was forced open while she was standing.
  • Matthew Ecker was found guilty of second-degree murder in April 2024 and sentenced to 30 years, despite the medical examiner ruling the manner of death 'undetermined'.

Insights

1Matthew Ecker's Inconsistent Narrative

Ecker's initial story to police, claiming Alex shot herself and he attempted first aid, quickly unraveled. He stated he washed his hands, but the bathroom sink was bone dry. He also claimed to have tried to stop bleeding, yet his clothes were spotless. Later, he recanted the CPR attempt and admitted to moving the gun out of panic, then returning it to the scene.

Police body cam footage of Ecker's initial statement and subsequent interrogation reveals his changing story. The dry sink and clean faucets were noted by investigators at the scene. Ecker's admission to moving the gun came after nearly two hours of questioning.

2Forensic Discrepancies Contradict Suicide Claim

Several forensic details challenged the suicide narrative. The gun was found completely clean, without blood spatter, which is highly unlikely if it was used in a close-range gunshot to the head. Alex's hands, despite having gunshot residue, were also clean of blood. Furthermore, Alex was right-handed, but the wound was to her left temple, and the gun was positioned near her left hand. The blood around her body had already started to dry, indicating a longer time elapsed than Ecker initially claimed.

Investigators noted the clean gun and Alex's clean hands, the left-handed wound on a right-handed person, and the dried blood at the scene. Ecker himself acknowledged the strangeness of Alex using her left hand.

3Critical Evidence: The Broken Door Lock

A small metal ring, part of the bathroom door's locking mechanism, was found underneath Alex's body. This piece of evidence was pivotal because it indicated the door was broken while Alex was still standing, not after she had fallen from a self-inflicted gunshot. This directly contradicted Ecker's claim that he broke the door down after hearing the shot, implying the door was forced open before the shooting.

Investigators discovered the metal ring underneath Alex's body during scene processing. This physical evidence was used by prosecutors to construct an alternative scenario where Ecker broke into the bathroom while Alex was alive.

4Ethical Violations and Relationship Dynamics

Matthew Ecker, a nurse practitioner, was found to be unethically prescribing Alex Pennig medications, including amphetamines and antidepressants, despite knowing her history of addiction. This raised questions about their dynamic and potential motives, such as Alex threatening to expose the affair or the unethical prescriptions.

Investigators found six bottles of prescription medication at Alex's apartment, all prescribed by Matthew Ecker. Text messages from Alex to Ecker days before her death showed her asking for medication refills.

Lessons

  • Always question initial statements in crime scenes, especially when they come from the person who discovered the victim, as inconsistencies can reveal deeper truths.
  • Prioritize comprehensive forensic examination of all evidence, including digital devices like phones, to piece together timelines and understand victim/suspect states of mind.
  • Recognize that even without a definitive 'homicide' ruling from medical examiners, a pattern of circumstantial and forensic evidence can be compelling enough for a jury to convict.

Quotes

"

"I'm married and she has been Oh, I got a girlfriend. I was just for like 2 years and I I'm a terrible person for that."

Matthew Ecker
"

"And then you washed your hands. Correct. That's why I don't have anything."

Matthew Ecker
"

"You're asking me to confess to something I didn't do."

Matthew Ecker
"

"I did take the gun and I put it in my suitcase. I got scared for a second. I didn't know what was going on when I took the gun. I may have put it in the holster. I don't remember if I did or not. I put it in the suitcase, went back, looked to her, and said, 'Yep.' went back to the suitcase, grabbed the gun, and put it back there. I don't know what my plan was there. I don't know what I was thinking. I got scared for a second, but that's that is what I did."

Matthew Ecker

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