otto bitterman is one of the most infamous. >> translator: i was sentenced to life in prison for committingders. >> he was a notorious criminal. his case was very notorious. but to me, he was actually a very pleasant person to deal with. he was very polite. very calm, mild mannered. he was actually just a very affable guy. >> bitterman led a small gang that robbed and killed at least four men and one woman over a three-year span. >> translator: it actually started when i got into a certain gang of friends with whom i had common interests, as far as weapons and drinking alcohol and having parties. and for things like that, of course, you need money. and, of course, as a young kid i didn't feel like working, but on the other hand i wanted to have money. >> how many people you the personally murder, otto? >> myself personally, i actually killed three people. but i participated in all five of the murders. >> bitterman buried one of the victims in his own backyard. >> translator: in a movie it looks real easy. you just hit the guy, he falls down and he's eliminated, you know. he's knocked out, s