The New Hampshire Supreme Court has rejected the appeal of a man serving 43 years in prison for orchestrating the murder of someone he mistakenly believed was a police informant.

Paulson Papillon was convicted of second-degree murder and conspiracy to commit murder in the 2015 death of Michael Pittman in Manchester.

Papillon argued that he shouldn't have been allowed to represent himself at trial, that there was insufficient evidence to convict him and that some of the evidence against him was illegally admitted.

The state Supreme Court agreed Friday on the last point but said the error was harmless.