reporter: describing a large white male with dark bushy hair driving a chevy avalanche. detectives connecting that vehicle to heuermann as well as using dna samples from bottles and this pizza crust pulled from the trash. those who lived there afraid a serial killer was on the loose. heuermann, an architect and a married father of two was allegedly hiding in plain sight and living a double life all along, even using burner phones, say investigators, who tracked heuermann s phone activity near his fifth avenue office in manhattan and his suburban home in massapequa park. investigators believe he used melissa bartholomew s cell phone making tainting phone calls. court documents detailing escort services and fake dating profiles. a stark contrast to the everyday businessman seen in this video