US officials said that Dley, who was in Philippines at time of attack, arrived in Los Angeles, where it was met by Federal Bureau of Investigation (FBI) officials.
Officials noted that assailant's girlfriend, Dley, is expected to be questioned. The sheriff of Las Vegas, Joseph Lombardo, said woman could shed some light on what was going through assailant's mind.
The Las Vegas police have said that paddock has been "meticulously planning" every detail of this attack, placing cameras in corridor with hotel room and firing at concert venue from his room on 32nd floor of hotel for 9 to 11 minutes.
Police reported that in 3 different locations, including hotel room of paddock, 47 weapons were seized from attacker's search. On or hand, federal authorities said that paddock was also investigating a $100 million cash transfer that he made to a bank account in Philippines last week.
Stephen Paddock, in US city of Las Vegas, opened fire at hotel across street to people in concert area on Sunday night, 59 people were injured in attack, 525 people had died.
The FBI has announced that attacker had no connection to any international terrorist organization. US President Donald Trump, who will go to Las Vegas today, "He is sick and crazy man." For offensive paddock