In the early morning hours of Dec. 16, 2022, St. Paul, Minnesota, homicide detectives Abby DeSanto and Jennifer O'Donnell were called to a downtown apartment building to investigate a reported suicide. A 32-year-old woman named Alexandra Pennig had been found dead in her bathroom with a single gunshot wound to the head.

For the detectives, what really happened to Pennig is something that still haunts them to this day. And it's the question at the center of "The Strange Shooting of Alex Pennig," reported by "48 Hours" contributor Natalie Morales. An encore of the episode is streaming on Paramount+.

Matthew Ecker, left, and Alex Pennig Terri Randall/Mary Jo Pennig

When detectives DeSanto and O'Donnell arrived at the apartment, they found out Pennig had not been alone at the time o

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