VALPARAISO | A Valparaiso man pleaded guilty but mentally ill in the wake of a March 2012 knife attack.
William Tyler, 27, faces up to six years behind bars as part of the deal struck with prosecutors.
Tyler pleaded guilty to a Class C felony count of battery in the March 12, 2012, attack on Marco Tomich, 19.
Tomich told police he was playing baseball with a friend at Will Park in Valparaiso, when Tyler began yelling at him from the backyard of his girlfriend's house in the 200 block of Brown Street.
Police said words were exchanged between the two and Tyler chased Tomich to the area of Morgan Boulevard and Brown Street where he stabbed him with a small knife.
Police said Tyler admitted to stabbing Tomich following an argument about money the man allegedly owes him.
Tyler told Porter Superior Court Judge Roger Bradford on Monday he suffers from numerous mental illnesses for which he was not receiving treatment at the time of the attack.
Bradford took the proposed plea agreement under consideration and scheduled a sentencing hearing for 1 p.m. Oct. 7.