Yang asked Judge Leslie Graves for mercy and repeatedly told the judge he was sorry, calling his actions an "unspeakable offense."
Ex-college employee sentenced in Chinese student rape case →
"We anticipate he's going to enter a plea to the lead count of first-degree murder," said Leslie Graves said, a spokeswoman for the Prince George's County State's Attorney's Office.
Plea deal expected in U.Md. student's killing →