A California college student injured in the Las Vegas music festival massacre filed a lawsuit Wednesday against the hotel owners, the concert promoter and bump stock manufacturers, claiming they were all liable in the mass shooting.

The claims against MGM Resorts International, which owns both Mandalay Bay and the concert venue that hosted the festival, raise more questions about a timeline that has changed numerous times -- and, according to Clark County Sheriff Joe Lombardo, could change again. The suit also questions why hotel staff didn't notice gunman Stephen Paddock's behavior in several instances.