Find out what happened to Jeanine Cammarata, 37, a Staten Island teacher and mom who vanished and was later found dead and burned in her husband's storage unit.

Jessica Pobega, Jeanine Cammarata's best friend, opens up about why Jeanine cheated on her husband.

Find out more about the murders of Gelareh Bagherzadeh and Coty Beavers, as detailed in Prosecuting Evil with Kelly Siegler.

The survivor of a New York City serial killer is able to give insight on what happened the night they were attacked.

Ali Irsan testifies in his own trial in an attempt to control the narrative.

When Dr. Teresa Sievers doesn't show up to work, her coworkers and family become very concerned about her wellbeing.

Mark Sievers attempts to blame his mother, Bonnie, for failing to set his home's security alarm.

When Mark Sievers hands his phone over to police, they find a huge number of explicit videos and pictures of women other than his wife.

Learn more about Mary Yoder, a seemingly healthy chiropractor from Buffalo, New York, who died in 2015 at the age of 60, later determined to have been poisoned.

Dr. Teresa Sievers is found brutally murdered, but was she killed after a robbery gone wrong?

Get a preview of the Season 2 finale of Prosecuting Evil with Kelly Siegler, which will delve into the case of Ali Irsan.

When police bring Ali Irsan in for questioning, he begins mimicking symptoms of a heart attack.