Randy Cherkas

When struggling filmmaker inadvertently records a notorious serial killer in the middle of a murderous act, he decides to use the footage to blackmail the madman into being the subject of a disturbing new documentary.

In the criminal justice system, sexually-based offenses are considered especially heinous. In New York City, the dedicated detectives who investigate these vicious felonies are members of an elite squad known as the Special Victims Unit. These are their stories.