>> he ended up falling down. being knocked down. >> reporter: the tipster claimed that josh wasn't the victim of the robbery but actually one of the participants. and, that his pal sirius had been the mastermind not only of the department store job, but the prime mover in a crime wave -- responsible for multiple armed robberies -- most of them captured on surveillance video. the two bodybuilders' secret sideline was a head-snapping revelation. >> sirius underwood at night is over here robbin' drug dealers, or he's robbin' tumbleweed restaurants, or they're hittin', you know, gabrielle brothers. but during the day, he's the sweetest guy, loves the women, they love him. he'll train with you. poster boy, just an all-around great american. >> reporter: the cops believed that linking sirius and his partner in crime josh daniels to the violent robberies would help