Roberto A News Today

"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, the mexico deal gone wrong was just some sort of game. the real bomber was playing it. the trouble was, nobody knew the rules or the purpose or where the game might end. more than one way to find a guy brazen enough ...

Roberto a very religious man who worked his way up from field hand to farm manager, oversaw the day-to-day operations of a multimillion-dollar spread. he knew the land. he knew the machines that worked it. he was utterly committed to that work. what did working that farm mean to your dad? >> that was everything. it was our whole, even our lives and his life, our whole life revolved around it. we were always there and growing up. >> reporter: first jobs as kids, right? >> yeah. learned how to dri...

The trouble was nobody knew the rules or the purpose or where the game might end. but more than one way to find a guy brazen enough to send that material to the cops. >> we had the letters we wanted to get analyzed. we wanted fingerprints. we wanted dna. >> reporter: the letters and envelopes came back clean just as the bomber said they would. what was going on? to investigators one theory seemed the least likely, that roberto was mixed up with the drug gang ms-13. the ayalas are a classic boots...

The game might end. more than one way to find a guy brazen enough to sent that material to the cops. >> we had the letters we wanted to get analyzed. we wanted fingerprints. we wanted dna. >> reporter: the letters and envelopes came back clean just as the bomber said they would. what was going on? to investigators one theory seemed the least likely, that roberto was mixed up with a drug gang ms 13. the ayalas are a classic bootstrap story. roberto a very religious man who worked his way up from ...