American Dad! Episode 3.06 The 42-Year-Old Virgin

At a poker game with a couple of work friends (and Roger dressed as an exchange student), Stan reveals that he has never actually killed anyone. He was taunted so badly by the first bad guy he was supposed to kill, that he couldn't do it (fortunately, a serious accident occurred and the man died anyway). Every other kill in Stan's history has actually been the result of fortunate timing. His work friends and Roger are determined to get Stan his first kill. When Randy, a sex offender, moves into the neighborhood, it seems that he is a likely good target.