manson says, "you know what you have to do." >> reporter: beausoleil stabbed gary hinman and then marytkins finished him with a pillow over his face. >> gary died because he didn't wanna give up his money. and the cars? >> yes. but it was equally important that he become a part of. >> what? become a part of us or we'll kill you? >> the revolution's coming. a lotta people are gonna die. >> reporter: manson had a term for those people, "piggies," another song title from the white album. >> if you wanna be one of the piggies, you know, today's pork is tomorrow's bacon. >> reporter: so on manson's orders, on the wall of gary's house they wrote the words "political piggy" and left a paw print -- all in the victim's blood, hoping it would lead the police to suspect black panthers committed the murder. >> the county police come to investigate. it's a murder, but they don't in any way link it to a black revolutionary execution. >> reporter: manson's mis-direction failed. in less than a week, bobby beausoleil was pulled over, driving one of gary hinman's cars. where, police found a bloody knife