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 ...

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

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 closely with the FBI believes the motive behind the ...

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

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 ...

What drives a serial killer — and how did Rex Heuermann go undetected for so long? After pleading guilty to multiple murders ...

A new ransom note in the Nancy Guthrie case has been sent to media outlet TMZ from someone who claims to have information ...