A Washington, D.C. grand jury indicted 19 people in connection with a protest against the regime of Turkish President Erdogan during his visit to America in May.
The goons are accused of conspiring to attack Armenian and Kurdish demonstrators - which is punishable by up to 15 years in prison - as well as assaulting USA law enforcement who tried to intervene.
The indictment describes the attackers as "pro-Erdogan civilian supporters, Turkish security personnel, and staff members from the Turkish diplomatic delegation" who "significantly outnumbered" protesters.
16 of those charged had previously been indicted on June 13, with an additional 3, all Turkish security, added on Tuesday.
Two of the 19 defendants are now in custody and are due to appear in court on September 7.
Newsham called on the suspects to turn themselves in, but Erdogan's team had already returned to Turkey and it remains unclear if they will return to the U.S.to answer the charges.
Eleven people were injured in the melee outside the Turkish ambassador's residence. Of the 17 men at large, two are Canadian citizens and the rest are Turkish nationals.
Two Turkish bodyguards were briefly detained after the incident.
Both Democrat and Republican politicians condemned the violence on American soil at the time saying it violated the right to freedom of assembly.
The Turkish Embassy claimed the protesters, who were located across the street from the Embassy, were members of a terror group.
Several face additional charges of assault with a deadly weapon.
Why would I bring my guards with me to the United States, if not to protect me?" he said in a speech in Ankara, adding that he will fight the charges "politically and judicially.
In a statement the ministry said that it protests the decision "in the strongest terms", and has conveyed its disapproval to the American ambassador.
Sixteen of those indicted were Turkish "security guards" who attacked demonstrators, injuring several.
The indictment notes that most of the protesters were supporters of Kurdish independence, but maintains that their protest was legal, peaceful, and permitted. The charge is punishable by a maximum of 15 years in prison and bias enhancement could lead to longer sentences, the statement said.