Long Island’s most notorious serial killer will help the FBI figure out what makes his sick mind tick — part of his chilling ...

Heuermann admitted to being the violent serial killer who brutally murdered eight young women in a spree that likely began in ...

A researcher and psychiatric clinical nurse specialist who worked closely with the FBI believes the motive behind the ...

Gilgo Beach killer Rex Heuermann will be evaluated by the FBI's Behavioral Analysis Unit after admitting to the murders of ...

Rex Heuermann is headed to a maximum-security cell for the rest of his life, but he has one major loose end: an appointment ...

The Behavioral Analysis Unit was established in 1972 to consult experts on "different, unusual or bizarre cases." ...

Long Island Serial Killer Rex Heuermann will spend the rest of his life in jail after admitting to eights murders on ...

A researcher and psychiatric clinical nurse specialist who worked for years with the FBI Behavioral Analysis Unit believes ...

'Today' co-anchor Savannah Guthrie's mother, 84, is still missing with no named suspects after her Tucson, Ariz., abduction.

The investigation into the disappearance of Nancy Guthrie, the 84-year-old mother of NBC's Today co-host Savannah Guthrie, is ...

Using research conducted by the FBI’s Behavioral Analysis Unit (BAU) and other sources, Part 1 of this three-part series discussed common deception strategies school shooters have used to evade ...