functioning like an automatic machine gun. the gunman firing bullets continuously. listen. the unmistakable sound different from anything we ve heard from all other recent mass shootings. none of them involving fully automatic guns. we are still going through the search warrant actively at this time, but it s in access of ten rifles. reporter: sources telling abc news paddock had at least 16 rifles and handguns. one of them an assault rifle, modified to fire like a machine gun. sources say some of the rifles were high powered, capable of slicing through police body armor. this is a classic wmd, this is a weapon and a man of mass destruction. reporter: we examined the first 90 seconds of the massacre, hearing nearly 200 rounds fired. hundreds more within the following minutes. paddock took brief pauses, likely to switch weapons or reload. the killer perched more than 300
players, can provide some insight. she is of filipino decent and authorities say she is overseas tonight. adding to the mystery, federal officials tell abc news paddock sent tens of thousands of dollars to someone in the philippines in the last few weeks. paddock s only real passion appears to have been gambling. his brother, eric, says paddock recently won a $40,000 jackpot, and was a multimillionaire. he was a wealthy guy and he liked to play video poker. he played multi-hundred dollar a hand video poker. reporter: six years ago, paddock sued a las vegas casino. when he slipped and fell on a casino floor. video shows him later rubbing his leg in pain. an arbitrator found in favor of the casino. until today, the only known connection to crime was paddock s late father, a violent bank robber who spent seven years in the 1960s as an fbi fugitive, described as psychopathic, suicidal, armed and dangerous. and brian ross with us from new york tonight.