A video that surfaced this week shows Diamon-Mazairre Robinson, the fugitive killed by Dallas SWAT last month, directing two other bodyguards as they assaulted two brothers trying to serve a lawsuit on U.S. Rep. Jasmine Crockett at her public swearing-in ceremony.
The January 2025 incident at Fair Park’s Hall of State unfolded as Dallas police officers stood by and alledgely refused to intervene, according to the brothers, JJ Jefferson and Lamar Jefferson, reported CBS News.
Robinson, 39, who used the alias Mike King and oversaw Crockett’s security detail, had earlier told authorities he was in charge of hundreds of agents, though Capitol Police later confirmed Crockett had no official security detail.
JJ Jefferson, a longtime political rival of Crockett, said he and his brother attended the event to legally serve her with papers challenging whether JJ Jefferson had been improperly removed from the 2024 ballot. They alerted Robinson to their purpose before the confrontation.
In the video, Robinson and the two unidentified guards physically removed the brothers from the building, choking them and placing them in handcuffs in front of officers, the Jeffersons said.
“You shouldn’t be assaulted while trying to exercise a lawful service,” JJ Jefferson said, CBS News reported. “And that’s called obstruction. And when I asked the officers to intervene, we were ignored.”
He recalled Robinson’s warning during the scuffle.
“All I know is the self-proclaimed agent who told me that, he said, ‘I’m about to slam you on his ground,’” JJ Jefferson said. “I said, ‘Do not slam me on this ground. Just let me up. I’ll walk out.’”
Lamar Jefferson described the exchange with Robinson.
“Mike King was right there in front of me, who I know now as Mike King,” he said, per CBS. “And I asked him, ‘So we can’t serve her these papers?’ He said, ‘No, you are getting the hell out of here.’”
The brothers said a sergeant and two other officers told them they lacked the authority to step in.
“‘We don’t have the jurisdiction to intervene, we’re just here to assist them,’” JJ Jefferson recalled being told. “That’s what I was told by the sergeant and two other officers.”
JJ Jefferson filed a complaint seeking assault charges. The Dallas Police Department’s chief at the time responded that “no investigation was warranted,” according to Jefferson. An officer directed him to take the matter up with “Mike King at U.S. Dignitary Services.”
When Jefferson followed up, he discovered the address belonged to Crockett’s congressional office in Washington, not a law enforcement agency. The person who answered the phone said no such service operated there, and Capitol Police confirmed Crockett had no security detail.
Robinson later called Jefferson and denied attending the ceremony despite photos showing otherwise, and refused to identify the other agents involved, Jefferson said.
The case went uninvestigated for more than a year while Robinson continued working alongside Crockett through her U.S. Senate campaign, which ended last month.
In March, authorities identified Robinson as a fugitive impersonating a federal agent. After a high-speed chase, he was cornered in a parking garage, pulled a gun, and was shot and killed during the standoff with Dallas SWAT, The Dallas Express reported.
JJ Jefferson said he wonders whether the outcome might have differed if police had investigated the assault promptly.
“I read law all the time,” he said. “You have to identify yourself if you are a police officer. A state officer, a marshal, federal agents, even a Secret Service.”
Dallas police declined to comment on the 2025 incident or the officers’ actions, referring questions to Capitol Police, which has not responded. The Jeffersons said a DPD detective contacted them about the case as recently as two weeks ago.
The brothers are calling for a Department of Justice investigation into the other members of Crockett’s security team, saying they believe the entire detail may have been illegitimate.
“They could all be frauds,” JJ Jefferson said. “I mean, it is my position that anybody who worked for, was under the direction of Mike King was illegitimate security, and they had no police authority.”
He added, “I’ll just be honest, they didn’t give a g**damn that I was a United States citizen. I was a person, I was trained, and they treated me like trash. They picked me up and told me I was so angry. And I’m still angry now. But this can be pretty embarrassing. The Dallas Police Department is being hired out by a fugitive.”