burner phone, which is prepaid and anonymous. and for each of the murders to get an individual burner phone and he used that to community with the victims. then shortly after, the death of the victims, he would get rid of the burner phone. and right away in december 2012, fbi cast analyst special agents with the cast unit of the fbi, the immediately began looking at that data. they compared the victims phones, with the burner phones and immediately honed in on some similarities. specifically, the massapequa park area. and they look at an area of confluence of four cell towers. and they realize that this had significance because the perpetrator of these crimes, was probably located within this area.