ANN ARBOR, Mich. (CNN) -- Authorities are investigating the mysterious death of a University of Michigan medical student.
Twenty-five-year-old Paul DeWolf, an aspiring surgeon with a magnetic smile, was found shot last week.
Police are investigating the high-school valedictorian, marathon runner and avid scuba diver’s death as a homicide.
DeWolf was found shot dead by a single gunshot wound in a pool of blood inside his bedroom at an off-campus fraternity house last Wednesday. Adding to the mystery, no weapons were found on the scene, and nothing stolen from DeWolf's room.
Police said they are "directing every available resource" to this investigation, but have no motive yet why someone would want to kill the popular aspiring surgeon.
As police hunt for DeWolf's killer, the University of Michigan is increasing police patrols and warning students to stay alert.
The med student also an active duty second lieutenant in the Air Force, planning to graduate in May and complete his residency while in the Air Force.
The shooting sent shockwaves through the University of Michigan community and stunned those who knew DeWolf well.
"It’s hard for me to believe that Paul would have any enemies. I don't know a single person that didn't like him," said Jason Halterman, one of DeWolf's friends.
Additionally, Dewolf's parents released a statement about their son’s death.
“A brother, a son, a man of faith, and a good friend to everyone who had the pleasure of meeting him… Paul will be greatly missed but will always be cherished in our heart and minds."