. >> what did adriana mendez and jill taylor have in common?ough a common friend at a party using drugs. >> reporter: detectives say that friendship forged in meth became so close that jill invited adriana and her htree kids to move in with her. and it was at jill's apartment where daniel met adriana and luis. >> adriana wouldn't know daniel without jill. >> correct. >> reporter: the detective was starting to get a clearer picture of how the alleged co-conspirators came together. and he soon found another of jill's friends who filled in some more blanks for him. >> me and jill were really tight. >> reporter: nikki vargas came forward to say it was no secret what jill and daniel wanted done. >> like, the day i met this bitch she was telling me about how she was trying to kill some guy, right? her and her boyfriend. >> did she say how? >> she had tried to poison him a couple times. >> reporter: and when that didn't work? >> daniel was trying to pay jill $10,000 to kill this fool. >> did you believe her? >> it was believable that they were going a