blown off. >> there was a series of random shootings. the comparison determined it was the same killer using the same gun, a .44-caliber weapon, on these homicides. therefore, the police nicknamed it the .44-caliber killer. >> he struck again on april 17th at 3:00 in the morning, killing 18-year-old valentina suriani and her fiance, 20-year-old alexander esau as they sat in a parked car in the baychester section of the bronx. >> we get the shooting back in the bronx, a girl named valentina suriani. but at that scene where that shooting occurred left a note addressed to my supervisor, and he called himself the son of sam. >> he talks about being possessed by a man he refers to as sam and the man he refers to to as his father, and he says his father requires blood. >> this got people's attention. i think it was just the sheer randomness of it. the fact you could be doing