Government Executive

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From the article:

In a prepared statement to be delivered to a House committee on Tuesday, Maj. Adam DeMarco said that protesters gathered in Lafayette Park were “behaving peacefully, exercising their First Amendment rights” when Park Police abruptly moved in to clear the area so that President Donald Trump could walk through to take a photograph at a nearby church, approximately 30 minutes before a 7 p.m. city curfew. Although the Park Police issued three warnings over a megaphone, DeMarco said — warnings required both by law and court rulings — “the announcements were barely audible and I saw no indication that the demonstrators were cognizant of the warnings to disperse.”

DeMarco also accused a Park Police liaison officer of misleading him about the use of tear gas. On June 1, DeMarco was on the scene serving as the liaison between the D.C. National Guard and D.C. Health, the city government’s department for health, and local hospitals, “to facilitate immediate needs requests, surge capacity planning, and emergency events associated with the pandemic.” He said that when he asked his Park Police liaison if tear gas was being used on protesters, the liaison officer claimed that explosions DeMarco could see from the clearing operation were “stage smoke,” not tear gas.

“But I could feel irritation in my eyes and nose, and based on my previous exposure to tear gas in my training at West Point and later in my Army training, I recognized that irritation as effects consistent with CS or ‘tear gas,’” DeMarco said. “And later that evening, I found spent tear gas cannisters [sic] on the street nearby.”