>> reporter: almost immediately ricky and ray started talking about a bloody crime spree. philadelphia detective called richmond detective bill brereton to see if their story checked out. >> did we have four people killed earlier in the week. i told him, yeah. he said was it a white family with two young children? i said, yeah, we did. >> reporter: in ricky gray's confession he went in to gruesome detail about what happened at the harvey home on new year's day. "it was a real nasty scene. i started cutting their throats, and they kept getting up, and they was scaring me. i remember seeing the hammer and picking it up. and then i don't know who i hit first. i was just hitting them all with the hammer. all i know is nobody was moving when i left." gray's confession fit the crime scene. two bloody hammers and a blood-stained knife were found in the harvey home. >> when they actually said they confessed to it, it was -- not shocking, but we were kind of speechless and, of course, he