HARTFORD, Conn. (AP) — A Connecticut court has rejected the appeal of a man who says he should not have been convicted for killing another man at his roommate's birthday party in 2013 because it was self-defense.

Jeffrey Hall was found guilty of manslaughter and sentenced to 20 years in prison for fatally stabbing 36-year-old Jerry Duncan in the neck in Bristol. Hall appealed, saying the trial judge failed to instruct the jury that state law did not require him to "retreat" from Duncan because Hall was at his home at the time.

The state Appellate Court ruled such an instruction wasn't needed because prosecutors never argued Hall was required to retreat from Duncan. The decision was released Friday.

Hall says he stabbed Duncan after Duncan punched him during an argument in his apartment.