Robert Krietemeyer pleaded guilty earlier this month to stabbing 49 year-old Latonya McNary.
It happened back in May of 2012. The 65-year-old was riding in a truck with McNary and her brother when police say there was a disagreement.
McNary's brother says Krietemeyer then stabbed Latonya in the chest.
A Vanderburgh County judge is scheduled to hand down the sentence Friday morning.