That article may be behind a pay wall for some. If so, summary: NG Major Adam "DeMarco’s testimony publicly contradicts the statements of Attorney General Bill Barr, who was also present at the clearing, and later said that he and other officials did not order the square violently cleared to make room for the President and his entourage. In a June 4 press conference, Barr took responsibility for “moving the perimeter,” but denied that there was a “correlation” with President Trump’s photo op.
The Park Police have defended the operation by claiming that it was necessary in order to build a fence that would provide more security for the White House.
But DeMarco wrote that fencing materials did not arrive until nearly three hours after federal law enforcement gassed and cleared the crowd."
There’s more confirming that Barr lied - the protesters were entirely peaceful, tear gas really was used, and more. Good for this officer for speaking out, especially considering the fate of Lt colonel Vindman.