Ellialti also faces a charge of felony aggravated assault.
Video of the fracas shows Turkish security aides beating demonstrators and kicking those some on the ground repeatedly in the head. The second man, Eyup Yildirim of New Jersey, faces two felony assault charges and a misdemeanour assault charge.
"The police did the best they could under the circumstances", Newsham said.
The two men attended a pro-Erdogan event outside Toronto's Turkish consulate 11 months ago Thursday in response to an anti-Erdogan coup.
Turkey will respond to problems at their source, whenever it is necessary, President Recep Tayyip Erdoğan said Thursday. Erdogan's government was similarly defiant following another incident previous year, when Turkish security clashed with protesters outside of the Brookings Institution, where the Turkish president was speaking. Any further steps will be responsive and proportional to the charges", a State Department official stated, adding: "We are committed to holding those responsible for the violence on May 16 accountable.
The four civilians accused have no such protection, however.
The charges against the 12, along with six other Turkish-Americans and Turkish-Canadians who joined the melee, "send a clear message that the United States does not tolerate individuals who use intimidation and violence to stifle freedom of speech and legitimate political expression", said State Department spokeswoman Heather Nauert.
"When you have folks that are peacefully protesting here in Washington, D.C., which is a place where we welcome peaceful protests, and they're attacked for no reason, we think it's extremely important", the police chief said. He described the attack as "the type of offence that is extreme in nature".
Yildirim was identified by the New York Times and the Daily Caller last month as one of the goons. Alpkenan Dereci, who was seen on video punching and shoving a protester, has not been charged with any offence.
Correction: June 15, 2016A previous version of this article misidentified the gender of one of the people charged today. Police are expected to release photos of the other eight possible suspects and appeal to the public for information on their identities, the official said.
Law enforcement officials in the American capital are expected to announce the charges at a press conference on Thursday, according to various reports in USA media outlets. We support them. We make sure that they are safe, but we also make sure that they follow our laws.
The action is likely to exacerbate what has become a major irritant in U.S.
Senior Republicans and Democrats in Congress had both demanded that Erdogan's team be condemned and held to account.
Two people were arrested on site, and MPD made two more arrests yesterday, charging a Virginia and a New Jersey resident. It occurred in broad daylight on a quiet Washington street soon after Erdogan met Trump at the White House.
The Turkish Embassy claimed without evidence that Erdogan's bodyguards were acting in "self-defense" during the incident, and that the protesters were affiliated with the PKK (left-wing Kurdistan Workers' Party).