Las Vegas police have chased "more than 1,000 leads" in their quest to establish a motive for why a gunman killed 58 people at a music festival.
Survivors are still reeling five days after Stephen Paddock opened fire from his hotel room on the crowd below before turning the gun on himself.
The attack is considered the deadliest mass shooting in recent US history.
Police said they have "looked at everything" but have yet to determine why Paddock went on a shooting rampage.
But as police continue to piece together the clues left behind by the elusive gunman, several questions remain unanswered, including why the wealthy, retired accountant carried out such a crime.
Las Vegas Metropolitan Police Department Sheriff Joseph Lombardo said police are examining a computer and multiple electronic devices found in Paddock's Mandalay Bay suite as well as evidence taken from his homes in Nevada.
Investigators also found a note containing numbers inside the hotel suite, but police say it was not a suicide note or manifesto.
