WAUKESHA, WI (WTAQ) - An appeals court has upheld the conviction of a state prisoner who threatened to kill two judges in Sheboygan County.

Martonez Wallace was found guilty in 2010 on two counts of threatening a judge, after he arranged to have a fellow inmate at Waupun send threats to Circuit Judges Gary Langhaff and Timothy Van Akkeren.

Wallace said the other inmate did not have a believable story. He said Jessie Williams told police he picked the judges’ names at random because he was frustrated with the judicial system – but Williams later changed his story to say that Wallace offered to pay him for making the threats.

The Second District Appellate Court in Waukesha said it’s up to a jury to decide the credibility of a witness – and in this case, the jurors did their job.