The Las Vegas Metropolitan Police Department sheriff said on Friday that Paddock's finances could have been a motive for the mass shooting.
Lawyers for police argued authorities could not release sealed documents because they are investigating more charges.
Some attorneys say MGM's paid room for its security guard could result in him providing a version of the shooting timeline that is favorable to the company.
"Our grief isn't enough," tweeted Hillary Clinton. "We can and must put politics aside, stand up to the NRA and work together to try to stop this from happening again."
A number of Las Vegas hotels enforced lockdowns, leaving partiers stuck inside clubs.