or was it from somebody who is not even on david salm's radar?ve weeks and it was the only lead investigators had. so they played along with the guy, played an ad, as requested, in the "sacramento bee". and sure enough, somebody responded. cops rushed to see him, perhaps arrest him. >> he was pretty surprised when he got a visit. >> false alarm, it was just an unlucky guy looking for a job. the killer though? the killer never called. so the whole ms-13 thing, was just a game. the real bomb was playing this game. nobody knew the rules or the purpose or where the game might end. but more than one way to find a guy brazenness to send band material to the cops. >> we had letters we wanted analyzed, we wanted fingerprints and dna. >> the letters anomalous came back clean. what was going on? to investigators, one theory seem the least likely, that roberto ayala was mixed up with the drunk gang ms-13. the iowa's are a classic boot strap story, a religious man was roberto ayala. he worked his way up from far manager to oversee a multi million dollar farm