East Baton Rouge Parish coroner Beau Clark told reporters that his office will be conducting a full autopsy in order to determine the 18-year-old's exact cause of death, as reported by LSU news site Tiger TV. He said blood and urine tests found that Gruver had a highly elevated blood-alcohol level and also the presence of THC in his urine.
"We are investigating this matter with the utmost seriousness", said F. King Alexander, LSU's president, in a statement obtained by The Daily Caller News Foundation.
Additional details were not released by campus police.
He further said all Greek activities at the university were suspended "indefinitely, pending the results of a thorough investigation". Stay with WDSU.com for updates. "As we have continually warned, hazing is unsafe and unacceptable".
Clark's office said final autopsy results are pending toxicology and histological testing that could take up to four weeks to complete.
The university has suspended "all Greek activities" pending the outcome of the police investigation of Maxwell Gruver's death.
Maxwell Gruver, 18, was taken to a Baton Rouge, Louisiana hospital for what school officials called a "medical emergency" and he was later pronounced dead.
"We in the LSU community are grieving today", Alexander said at a press conference Thursday.
"We're committed to investigating this situation thoroughly", said Bob Biggs, the chief executive at Phi Delta Theta.
Gruver, who graduated from Blessed Trinity Catholic School, had not yet pledged with the fraternity.
Alexander described Gruver's death as "tragic and untimely".
Alexander said he wasn't aware of any arrests immediately made in connection with Gruver's death. The fall rush period has ended, and students who received invitations, or bids, to join fraternities are now in a pledging process to become a member.