John Bittrolff

John Bittrolff is an American convicted murderer and a suspect in the Long Island serial killer case. In July 2014, he was charged with the murders of Rita Tangredi and Colleen McNamee. He is also a suspect in the murder of a third woman, Sandra Costilla. Bittrolff became a suspect in the unsolved murders after his brother, Timothy Bittrolff, was partially matched to DNA found on the bodies in 2013. Timothy Bittrolff submitted the sample after violating an unrelated order of protection, in 2013.