Ndiaga Diagne, a Senegalese immigrant-turned US citizen, was not on the radar of local police or the FBI before Sunday’s attack. Now, his personal life, criminal history and private affiliations are under extreme scrutiny as investigators dissect his motive.

More than 70 GOP House members signed a letter asking Congress to stop legal immigration until “proper vetting protocols” are in place.

Two victims were identified as investigation continues. FBI says suspect Ndiaga Diagne had not been on its radar, while APD said he legally purchased guns.

The shooter was identified by Austin police as 53-year-old Ndiaga Diagne. Multiple U.S. officials told CBS News he was a naturalized American citizen born in Senegal. Investigators believe the gunman acted alone. Police say he had a handgun and a rifle during the attack. The guns were acquired legally in San Antonio in 2017, Davis said Monday.

Monday marked 190 years of Texas’ independence as the state grows closer to its bicentennial anniversary. According to Texas 2036, a nonpartisan public policy organization,

AUSTIN, Texas (AP) — The gunman who opened fire outside a crowded Texas bar and killed two people in an attack that wounded 14 others was not on the radar of authorities before the shooting, federal and local investigators said Monday.