TERRE HAUTE, Ind. (AP) — Investigators have concluded that the drowning of an 18-year-old Indiana State University freshman during a fraternity event in Illinois was accidental.

The (Terre Haute) Tribune-Star reports the Clark County, Illinois, sheriff’s department reached the conclusion about the Oct. 23 death of Yiorgo Karnezis of Munster, Indiana. The department says the case is not being forwarded to the Clark County state’s attorney.

The school has said that Karnezis apparently fell from a boat into a small pond during a Sigma Chi fraternity social event in the rural community of Dennison, Illinois. The Vigo County, Indiana, coroner earlier ruled his death was consistent with accidental drowning.