WASHINGTON (NewsNation) — Investigators are digging into the background of the man accused of shooting two National Guard members at point-blank range near the White House last week.

Homeland Security Secretary Kristi Noem said officials are gathering more information from the family and associates of Rahmanullah Lakanwal, a 29-year-old Afghan national who is facing a first-degree murder charge in connection with the shooting.

One of the guardsmen, U.S. Army Spc. Sarah Beckstrom, died Thursday; the other, U.S. Air Force Staff Sgt. Andrew Wolfe, remains in critical condition.

President Donald Trump said he invited the families of both guardsmen to the White House.

“I said, ‘When you’re ready, because that’s a tough thing, come to the White House. We’re going to honor Sarah,” Trump told reporters Sunday. “And likewise with Andrew, recover or not, we’re gonna honor him.”

Noem: National Guard shooting suspect was radicalized in the US

Noem said she believes the suspect became radicalized at some point after arriving in the United States.

Lakanwal came to the U.S. in 2021 as part of Operation Allies Welcome, which helped evacuate 76,000 Afghans following the U.S. withdrawal from Afghanistan. He previously served in a special Afghan army unit that worked with the CIA.

Lakawal had been living in Washington state with his wife and children.

Trump admin freezes all asylum processing after DC shooting

Over the weekend in Washington, D.C., a memorial grew at the site of the shooting. West Virginia Gov. Patrick Morrisey said several local churches held prayer vigils for Beckstrom and Wolfe, both of whom served in the West Virginia National Guard.

In the wake of Wednesday’s shooting, the Trump administration has put a freeze on processing for all asylum applications. Trump also said he wants a permanent pause on migrations from what he called “third-world countries.”