it was rex heuermann's description to a "t."cribed this john going out to a black pickup truck, but the specifics about this pickup truck are important. it was described in a way that would only match one vehicle particularly, and that's a chevy avalanche. >> byron: the avalanche reduced the pool of possible suspects from thousands to dozens. then police say they found a pizza crust in his trash can outside of heuermann's office which they used to take a dna sample. that sample matching dna from a hair found on one of the victims, according to police. >> rex, did you do it? >> byron: they arrested heuermann, 6'4", outside his manhattan office in 2023. initially charging the now 60-year-old with the death of the so-called gilgo four. >> rex heuermann is a demon that walks among us. >> byron: prosecutors say heuermann was living a double life. the public saw a father of two and architect who commuted into new york city. >> i'm an architectural consultant, i'm a troubleshooter, born and raised on long island -- >> reporter: heuerma

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