Las Vegas shooter, Stephen Paddock initially planned to attack Chance the Rapper & Lorde Concert

The gunman who murdered at least 59 people at a country-music concert on Sunday might have originally targeted another Las Vegas music festival held the previous weekend, according to a senior law enforcement source.

Stephen Paddock rented multiple condos overlooking the annual Life Is Beautiful Festival, which this year was headlined by Lorde and Chance the Rapper, said the source, who is not directly involved in the investigation but has been briefed on its progress.

A source suggested that Paddock may have lost his nerve or simply changed his plans and checked into the Mandalay Bay Hotel on September 28. He then took a suite overlooking the Route 91 Harvest Festival and opened fire on an estimated 20,000 concertgoers below.