HAYWARD, Calif. (AP) – A jury has found a software engineer guilty of voluntary manslaughter in a road-rage stabbing death of another man in a Livermore parking lot.

The Oakland Tribune reports that jurors on Thursday convicted Cort Holbrook of the March 2011 slaying of 48-year-old Ricky Ziesmer. Holbrook had initially been charged with second-degree murder.

Police say Holbrook fatally stabbed Ziesmer with a knife after the two exchanged words from their vehicles and pulled into the parking lot.

Holbrook said he stabbed Ziesmer in self-defense after the victim punched him.

Police say Holbrook should have called 911 or escaped and didn’t have to fight.