do that right away. >> reporter: former bergen county prosecutor, john molinelli was on the scene in those pre-dawn hours. >> unlike district attorney's office nationwide, in new jersey a county prosecutor is not just the chief law enforcement officer of the county, but also directly oversees the investigation of all major crimes. >> reporter: molinelli says from the first time he laid eyes on rob cantor's body, something didn't look right. so he asked the medical examiner to fast track an autopsy. >> you could see some indication that this wasn't just somebody who was just smoking in his bed and then the bed lit fire. >> reporter: what was your gut telling you as to what this could be? what you're looking at? >> the first thought was, "well, whoever did this act lit the crime scene in an effort to -- to frustrate law enforcement