Investigators with the Homeland Security Investigations (HSI) were reviewing the authenticity of a video that allegedly showed Alex Pretti attacking federal agents days before he was killed by Border Patrol agents. Department of Homeland Security (DHS) spokesperson Tricia McLaughlin confirmed to the Daily Caller News Foundation that the video was “under review” by HSI. BREAKING: DHS confirms to @FoxNews they are aware of this video & HSI is investigating it. (RELATED: Trump Admin Places Agents In Alex Pretti Shooting On Administrative Leave)The footage further showed agents body slamming and holding the man down to the ground. DHS Secretary Kristi Noem faced scrutiny after she alleged that Pretti acted as a domestic terrorist by approaching Border Patrol agents with a firearm.