By Jonathan Allen
(Reuters) – Investigators are talking to the brother of a gunman who killed 58 people in Las Vegas last week before he shot himself to death as they seek to determine what motivated the mass shooting, authorities asserted Monday.
The shooter, Stephen Paddock, 64, was seen on numerous occasions in Las Vegas without any human being accompanying him and he gambled the night before the shooting, Las Vegas Sheriff Joseph Lombardo asserted at a news conference.
“This individual purposely hid his actions leading up to this event, and it is complex for us to find the answers,” asserted Lombardo, who agreed he was frustrated with the speed of the investigation.
Paddock sprayed an outdoor concert with bursts of gunfire from high above in a Las Vegas hotel window on Oct. 1, killing 58 and wounding hundreds more, before shooting himself.
(Reporting by Jonathan Allen in New York and Alex Dobuzinskis in Los Angeles; Writing by Joseph Ax; Editing by Lisa Shumaker and Jonathan Oatis)