An autopsy performed on Brandon Landau, the Illinois Wesleyan University student whose body was found on Sunday, is inconclusive. Investigators are now awaiting the results of toxicology and other tests to determine what caused the 18 year old's death.

The Wall Street Journal reported that Landau's body was found after a party at White Pines State Park Outside of Oregon, some 85 miles west of Chicago. CBS Chicago reported that the party in the state park was thrown by the Illinois Wesleyan chapter of the Sigma Pi fraternity.

Illinois Wesleyan spokesman Matt Kurz said that Landau was a member of the fraternity, according to

Landau was airlifted to Rickford Memorial Hospital where he was pronounced dead. The Winnebago County Coroner's office told the media that Landau's lower torso was in a stream while his upper body was on a log. Landau, who is from Bronx, N.Y., suffered superficial cuts and abrasions to his body, according to CBS Chicago.

Kurz also told the media that Landau was a first-year student at the school. He Landau lived in a first-year student dormitory.