U.S. President Donald Trump’s border czar, Tom Homan, says the U.S. Immigration and Customs Enforcement (ICE) officer involved in a deadly shooting in Maine is subject to an internal review of the officer’s vetting. The review follows allegations made by relatives to The Associated Press, who say the officer has a history of serious mental health struggles and violent behavior. Homan said that if the allegations are accurate, he believes the officer should not have cleared the vetting process. Multiple outlets report that the shooting resulted in the death of a Colombian national in Maine. The internal review is intended to examine whether the officer’s background information and related screening procedures were handled appropriately prior to employment. The reporting focuses on whether vetting procedures missed warning signs described by relatives. The available accounts do not establish whether the allegations about the officer’s history are proven, but they describe the government action being taken in response to the claims and the incident.