the description nearly identical to the one vincent cabello used in the milwaukee vault robbery. vincent is questioned, he stays true to form. >> his story was, "i don't know nothin' about nothin'." >> reporter: and now, the fbi finds itself with three major cases all involving the same family. which begs the question, "how in the world did archie cabello get another armored truck job in the first place?" do these guys not do a background check? >> well, they do. ironically enough there was no response until after the robbery. >> reporter: and what was the response then? >> the response was, criminal information found. >> >>er -- archie, i guess, handed his uniform shirt, and id badge and said, "i'm done here." and that was the last we heard from archie in person at all. >> reporter: within weeks, it's clear to everybody what really happened -- archie and vincent staged the whole thing and pulled their biggest job yet. vincent was the robber this time. archie, the inside man. and the loot -- those shrink wrapped bricks of cash. $1.5 million each. gulian was dispatched from oregon