The motive behind Stephen Paddock's slaughter of 58 people at Las Vegas' Route 91 Harvest music festival remains a mystery 10 months after the deadliest mass shooting in US history, according to a final criminal investigative report.
The owner of the Mandalay Bay hotel says it bears no liability in last year's Las Vegas concert massacre and is asking the courts to grant federal protections that shield companies who provide anti-terrorism products and services to civilians.