(CNN)–It took about 10 minutes of gunfire for Stephen Paddock to carry out the deadliest mass shooting in modern US history.
From his position at a Las Vegas hotel, Paddock fired a barrage of bullets at 22,000 concertgoers below at a country music festival — made possible through what appeared to be meticulous planning.
The shooter had checked into a hotel room overlooking the music festival, stocked a cache of weapons there and set up cameras inside his hotel suite and hallway.
The first call of shots being fired came Sunday, 10:08 p.m. and the gunfire stopped at 10:19 p.m., said Clark County Undersheriff Kevin McMahill on Tuesday. He said the shooting went off and on for nine to 11 minutes.
The massacre left 58 people dead and another 500 people wounded from gunshots to stampede injuries.
- SNIPER IN HIGH-RISE HOTEL KILLS AT LEAST 58 IN LAS VEGAS
- LAS VEGAS SHOOTER WAS RETIRED, HAD NO CRIMINAL RECORD
- LIVE COVERAGE: KRON4’S LAS VEGAS SISTER STATION
- LAS VEGAS MASSACRE: CONCERT VICTIMS TALK ABOUT SHOOTING
- LAS VEGAS ATTACK IS DEADLIEST SHOOTING IN MODERN US HISTORY
- WOMAN SAYS HUSBAND DIED TRYING TO SAVE HER IN LAS VEGAS SHOOTING ATTACK
- LAS VEGAS SHOOTER’S DAD WAS A BANK ROBBER ON THE FBI MOST WANTED LIST