A fatal police shooting in Dallas this week has drawn national attention after authorities revealed that the suspect previously worked as part of the security detail for U.S. Representative Jasmine Crockett. The incident, which unfolded late Wednesday night, involved a standoff between police and a man later identified as 39-year-old Diamon-Mazairre Robinson, who had been operating under the alias “Mike King.”
Officials say Robinson was wanted in connection with a federal investigation involving impersonating a law enforcement officer. When officers attempted to arrest him, he reportedly fled into a hospital parking garage in Dallas and barricaded himself inside a vehicle, triggering a response from Dallas police and SWAT teams.
Authorities deployed tear gas during the standoff in an attempt to force him out of the vehicle. Police said Robinson eventually exited the car and pointed a firearm at officers, leading police to open fire. He was killed at the scene. Officials stated that Robinson did not fire the weapon and that no officers were injured during the encounter.
Alias and alleged impersonation investigation
Law enforcement sources say Robinson had been publicly presenting himself as “Mike King,” a name he reportedly used while running a business that arranged off-duty security jobs for police officers across North Texas.
Investigators believe the enterprise connected law enforcement officers with private security work at events, hotels and other venues. Authorities allege Robinson told some officers he was a detective with the U.S. Capitol Police, a claim that appears to have triggered the federal investigation.
According to reports from CBS News Texas, Robinson also drove a vehicle designed to resemble an undercover police car and used license plates that were allegedly stolen from vehicles outside a military recruiting office.
Law enforcement sources said Robinson’s company was even promoting security jobs connected to upcoming FIFA World Cup events in the Dallas-Fort Worth area, offering pay rates of about $90 per hour for off-duty officers.
Prior criminal history
Records reviewed by reporters show Robinson had a criminal history dating back more than a decade. Between 2009 and 2012, he was arrested seven times on theft-related charges in Dallas, Duncanville, Irving and Dallas County, including several felony cases.
Despite pleading guilty in those cases, court records indicate the outcomes involved fines of up to $2,500 and probation terms ranging from one to ten years.
The revelations have raised questions among investigators about how Robinson was able to operate a business coordinating off-duty police work and maintain close connections with members of the law-enforcement community.
Connection to Rep. Jasmine Crockett
Photographs obtained by reporters show Robinson standing near Rep. Jasmine Crockett at public appearances and campaign events during her recent U.S. Senate primary run. Sources say he served as part of her security detail at several events.
Documents reviewed by reporters also indicate that someone using the name “Mike King” received payment for security services in 2025 connected to Crockett’s campaign activity, including one payment listed as $340.
However, there is no evidence that Robinson was a federal employee or official member of a congressional security team. Like many elected officials, Crockett reportedly relied on a combination of official protection and contracted security personnel during public appearances.
Authorities have emphasized that Rep. Crockett has not been linked to any wrongdoing in connection with the case.
Questions surrounding off-duty security networks
The case has also brought attention to the loosely regulated world of off-duty law enforcement contracting. Across many U.S. cities, police officers often take secondary jobs providing security for private companies, political campaigns and public events.
Investigators are now examining how Robinson was able to position himself within that ecosystem, allegedly coordinating work for officers and presenting himself as a law-enforcement figure despite his criminal background.
Officials in Dallas say the investigation remains ongoing, and several details about Robinson’s activities and the federal probe that led to the attempted arrest have not yet been publicly confirmed.
Rep. Crockett’s office has not issued a detailed public statement and indicated it is waiting for more information from law enforcement.
