The brain of the OSU football player who apparently committed suicide will be sent away for more tests.

The Franklin County Coroner's office has finished the preliminary investigation into the death of an Ohio State University football player, but it will be at least several weeks before all the tests are complete.

Coroner Dr. Anahi Ortiz said the initial autopsy has found that Karageorge died from a gunshot wound to the head. The preliminary autopsy could not determine if it was a self-inflicted wound. On Sunday, police indicated that Karageorge’s death was most likely a suicide.

“Preliminary investigation is showing that he died from a self-inflicted gunshot wound,” said Sgt. Rich Weiner from the Columbus Police Department.

Last week after he went missing, Karageorge's family said he's suffered from concussions and had become disoriented in the past.

Officials say that Karageorge's brain will be sent to the Ohio State University Wexner Medical Center where neurologists and pathologists can investigate any possible concussion damage. Toxicology reports will also take several weeks.

Several hundred students gathered on the OSU campus Sunday night to remember Karageorge and pray for his family.

The Ohio State Athletic Department issued the following statement on Sunday:

The Ohio State University Department of Athletics was shocked and saddened to learn today of the death of student-athlete Kosta Karageorge, a senior from Columbus. Our thoughts and prayers are with the Karageorge family, and those who knew him, during this most difficult time.

Ohio State players were remembering their friend on Monday. “He was a funny guy, really light-hearted, goofy. He always had a smile on his face. To hear news like that was tragic, but we're praying for his family and he's in a better place now,” said Joshua Perry, OSU lineman.