MADISON, Wis. (AP) -

A state appeals court has upheld the homicide conviction of a man who stabbed a 93-year-old woman to death in northern Wisconsin.

The 3rd Circuit Court of Appeals on Tuesday rejected the argument of Christopher Roalson. He was convicted in 2012 of first-degree intentional homicide in the 2009 death of Irena Roszak in Sawyer County. Roalson was sentenced to life in prison without parole.

Prosecutors say Roalson shouted satanic references as he stabbed Roszak and she begged for her life.

Roalson argued on appeal that his constitutional rights were violated when the state failed to produce a DNA analyst who first analyzed the evidence.

But the appeals court in affirming Roalson's conviction says there was nothing wrong with another DNA analyst testifying in place of the original analyst.