Kaijing Tang, 21, of China, was pronounced dead at the scene by Centre County Coroner Scott Sayers. Tang died as a result of blunt trauma to the head.
Michael Angelo Schiavone is the fourth former brother of Beta Theta Pi to plead guilty in the Tim Piazza case.
The Centre County judge assigned to oversee the trial for former Beta Theta Pi fraternity members has recused himself from the proceedings.
The former manager of Baby's Burgers and Shakes is facing felony charges after she allegedly stole nearly $80,000 from the downtown State College restaurant over a two and a half year period.
"The guilty plea of Bo Han Song is one more step in a long road of towards justice for the parents of Tim Piazza."
Twenty other defendants still face charges in the case. A trial for most of them is scheduled for February 2019.