DeKALB – Authorities are waiting for toxicology results after an autopsy on the 19-year-old found dead in a fraternity house did not reveal anything unusual, DeKalb County Coroner Dennis Miller said.

David R. Bogenberger, a freshman at Northern Illinois University and a 2012 Palatine High School graduate, was found unresponsive in a bunk bed Friday morning at the Pi Kappa Alpha house, 1020 W. Hillcrest Drive in DeKalb. DeKalb police responded to a call at 10:14 a.m. Friday, and Bogenberger was pronounced dead at the fraternity house about 30 minutes later, authorities said.

DeKalb police said they found evidence of alcohol use near Bogenberger, who had been among several people invited Thursday to the fraternity house. They wanted to interview more than 20 people who had been at the fraternity house around that time and review autopsy results before determining what caused Bogenberger's death, DeKalb police Lt. Jason Leverton said.