Fresno police are investigating the death of a Bakersfield teen after a night of drinking at a frat party.Philip Dhanens, 18, was a freshman at Fresno State and graduated from Garces High just a few months ago.The Fresno chief of police says his department is taking this investigation very seriously. They want to know who supplied the booze and how underage students were able to get their hands on it."I currently have three detectives that are on this case. One of those detectives is the alcohol beverage control detective for the police department," Fresno Police Chief Jerry Dyer said.Fresno police say Philip Dhanens was drinking at a party at the Theta Chi frat house Friday night.He was discovered unconscious sometime after midnight and rushed to the hospital.He died Sunday morning.Now investigators want to know how it could have happened."What was said to those individuals that are pledging Theta Chi? What level of care was provided to those individuals that were drinking? Were looking to see what criminal violations are present, so that we can make sure we are holding accountable those individuals that contributed to this young mans death," Dyer said.Dhanens was a football player at Garces high and graduated with a 3.7 GPA.Dhanens wanted to be an engineer. He had been accepted to the engineering program at Fresno state and hoped to be a walk on for the football team.A young man has lost his life and we want to do everything that we can to determine why that occurred and how that occurred," Dyer said.Services for Dhanens have not been announced.