ST. PAUL, Minn. — St. Petersburg in 2022 The suspicious death of a Minnesota nurse who died of a gunshot wound in her St. Paul apartment is at the center of an episode of “48 Hours,” now available to stream on Paramount+.

St. Paul police

Alexandra Pennig’s apartment responded on December 16, 2022

After Matthew Ecker, 45, then living in Fergus Falls, made a frantic call to 911.

But the investigation that followed painted a different picture and led to Ecker being convicted of 32-year-old Pennig’s murder.

Courtesy of Ramsey County Sheriff’s Office

On April 3, 2024, the jury found Ecker guilty of second-degree intentional homicide.

He was sentenced to 30 years in prison.

But the road to justice was not cut and dry, and Ecker’s siblings and parents still believe he was wrongfully convicted.

The episode “48 Hours” details the relationship Ecker and Pennig share, which began as co-workers at a medical clinic in Fergus Falls. Ecker was a nurse practitioner and Pennig was a licensed practical nurse.

At the time of Pennig’s death, she and Ecker had been in a two-year relationship. Ecker lived in Fergus Falls with his wife and children and traveled to St. Louis to see Pennig. He went to Paul.

According to the 48 Hours episode, he went to St. Louis that night after Pennig told him he was in danger. He said he went to Paul.

That’s why he put a gun on him, he said.

That gun was used to kill Pennig in the apartment bathroom. The question of who fired the gun is at the center of the 48 Hours episode.

“The Bizarre Shooting of Alex Pennig” is available to stream on Paramount+.