2. The Sound of Fear

Three horrific murders. Three different 911 calls. All three callers claim they're innocent - but for the police, the call can reveal so much more than just the facts of the case. Find out which of them is the real killer in disguise.

3. The First Suspect

A woman vanishes, and her husband calls 911; months later, police find her badly beaten body and make him suspect no. 1; a strange noise in the background of a 911 call leads police to the true killer.

4. For Love or Lies

Three murders, three callers claiming innocence, and one of them is lying. The 911 call is the evidence hiding in plain sight

5. Judging Reactions

A woman calls 911 after she finds her mother dead with a knife in her chest; is she a grieving daughter? Then, someone murders a husband in a remote park on Valentine's Day; is it a tragic accident or a lover's tryst gone wrong?

6. Death and Denials

A man finds his girlfriend strangled in a bedroom closet and becomes the main person of interest.