ariet, richard, magdi and ryan.e him up and kill ariet in a brutal hands-on way and leave no trace? >> that's what it looked like. it looked like two ghosts had just come in and committed the ultimate crime. >> it seemed improbable and it encouraged detectives to look closely at ryan. he claimed to be a victim. but was he really? police learned the friend he was with the night of the murder had offered ryan a knife for protection. just hours before ryan's mother was brutally killed with a knife. a knife that had not been found. they also learned ryan smoked marijuana and not just at the occasional party. he smoked every day. and he wasn't just smoking. >> [ inaudible ]. >> police found small amounts of marijuana in ryan's room along with a bong, baggies and tin foil and there was more like the description ryan had given detectives about the two suspects. >> both male blacks, he said they were large. he said they acted like they were from a gang but that was something that we still didn't know 100% sure if that was t