-- >> reporter: but remember, paul's ex-in-laws told detective salm that paul was more likely the guilty party. >> probably 90% paul. >> reporter: so now the detective turned the tables a little and suggested maybe it was he, paul, who was jealous of roberto. >> i didn't hate robert. >> okay. did you not like him? >> i didn't like the fact that he would cop an attitude with me. just over something stupid, you know, and little. >> reporter: detective salm pressed paul about his past. >> you've got several incidents here -- >> i have a criminal record. >> you've been involved in some bad stuff. okay? you cut phone wires. >> i tried to help you guys out through this whole thing. you're going to start to cop an attitude --