East Baton Rouge Parish District Attorney Hillar Moore III said Friday that it's too soon to know whether charges could be filed against LSU students who might have contributed to the death of 18-year-old Maxwell Gruver. 

But he's hopeful more people will come forward to tell authorities what happened to the fraternity pledge who died. 

"Right now I think it's premature to guess whether there would be charges at this point because we're too early in the process," he said. "We've interviewed many of the fraternity members, and several have chosen not to give a statement and have hired attorneys. Many others have yet to be interviewed."

LSUPD is investigating whether Gruver's death was the result of hazing by his fraternity Phi Delta Theta. Gruver was taken from the fraternity house to Our Lady of the Lake on Thursday morning for a medical emergency where he was pronounced dead. 

A preliminary autopsy found high levels of alcohol in his system, but it could take up to four weeks to determine the cause of death. 

Moore said the toxicology report could also determine whether charges would be filed. 

Charges, if filed, could range from hazing to negligent homicide or manslaughter. 

Moore said investigators would be looking into the availability of any possible security camera footage or cell phone camera videos and encouraged anyone with documentation to come forward.

Follow Rebekah Allen on Twitter, @rebekahallen.