Tom Homan, White House border czar, speaks to members of the media outside the White House in Washington, D.C., on July 20. On Sunday, he said ICE's vetting process was under review after a shooting in Maine. Photo by Aaron Schwartz/UPI | License Photo

July 26 (UPI) -- White House border czar Tom Homan said Sunday that Immigration and Customs Enforcement's vetting process was under review amid allegations that the agent involved in a fatal shooting in Maine may have had a criminal background that should have barred him from the agency.

Homan made the comments during an appearance on CNN's State of the Union. The host of the morning talk show, Dana Bash, showed Homan court documents indicating that the officer, whose name officials haven't revealed, "was accused of abuse by two ex-wives." A judge had ordered the man to forfeit any firearms in his possession.

Homan said the allegations raised questions about whether ICE was properly vetting employees.

"If those are facts, I don't think he should ever have cleared vetting," Homan said. "How did the vetting process fail? Was that information not available? Did they not know? So, there's a separate administrative investigation on what happened here."