Heuermann admits killing 7 women at his home in prison interview.

Rex Heuermann, who pleaded guilty to the Gilgo Beach serial murders, told his ex-wife in a prison interview that he killed seven of the eight women at their Massapequa Park home, according to a new documentary. Heuermann, 62, admitted to strangling the victims over a 17-year period and is set to receive life in prison without parole.