"An Unexpected Killer" dives into murder cases with shocking reveals. In Season 3, the murder of an Iowa mom by a self-appointed "Night Stalker" is investigated. 

In 2012, nursing student Megan Sharpton told relatives she was on her way to a job interview. Hours later, her body was discovered on fire on the side of a road. 

When Paige Hueser first saw the witness sketch of the man who killed her mother, Nina Whitney, it was "entirely unfamiliar." Months later, she realized exactly who it was.

Anna Mae Branson was stabbed in the back 97 times by somebody she had helped out numerous times.

After Karin Strom was found dead at her home in 1980, it would take more than 20 years before her killer was finally brought to justice.

When a beloved member of the Ardmore, Oklahoma community was brutally murdered, police were left to find his killer among those he trusted and tried to help.

It took two years for Karen Gregory’s killer to be identified thanks to a bloody footprint left at the crime scene.

Renee Pagel’s murder went unsolved for 14 years until one phone call changed everything.

Aaron Iturra was an activist who spoke out about gang violence, only to be betrayed by someone who pretended to have the same values that he did.

After Charlotte Waites was found dead in 1998, no one suspected that her husband was the one who brutally murdered her.