(Updated at 3:05 p.m.) The man accused of stabbing Lyon Village resident Carl Diener to death has pleaded guilty.

Roger K. Clark III entered a guilty plea on first degree murder charges today, prosecutors said. Circuit Court Judge Joanne F. Alper accepted the plea this afternoon. A sentencing hearing is now scheduled for April 27.

Diener, a 57-year-old Lyon Village resident, was found lying dead on a Clarendon street early on the morning of Dec. 29, 2009. A dogged investigation finally resulted in the arrest of Clark and another man in June 2011.

The second suspect in the case was later released after charges against him were dropped.