Who killed Heidi Firkus? Her husband Nick says he didn't do it.

For over a decade, investigators worked to piece together the 2010 murder of Heidi Firkus who, according to her husband Nick Firkus, was shot and killed in a burglary at the couple's Saint Paul, Minnesota, home. Investigators, however, believe the real killer was someone who knew Heidi.

On the morning of April 25, 2010, 25-year-old Heidi frantically called 911 to tell them that someone was breaking into the home she shared with her husband Nick. During Heidi's call, she was heard screaming out after a loud noise prosecutors believe was the shotgun blast that killed her. 65 seconds later, Nick dialed 911 from Heidi's phone, and told the dispatcher he and his wife were shot by an intruder.