. >> the victim's name was denise raymond. she was an executive with fedex.deoed the entire scene and anything that might seem important. a wallet with missing card, a carton of juice in the sink, an audio cassette on the bedroom floor. it had been ripped out of denise raymond's answering machine. >> unfortunately, i'm unavailable to answer your call right now. >> detectives are mystified over the vicious killing of a successful representative. >> the case went to tom aiello. they knocked on doors and collecting evidence. then as the sun rose the next morning some of those cops turned their attention to another murder, another bloody crime scene. this is the video police recorded of that second murder scene. it was seemingly unrelated, but just a half mile away in the same precinct. this was a busy night for the murder business in the bronx. >> time now is approximately 7:15 a.m. on january 19, 1995. >> this time a livery cab driver named baithe diop was found slumped over his steering wheel shot momentum timmultiple times. >> the investigation of the driver