Man Sentenced After DNA Linked Him to Armed Robbery in Tulsa

TULSA, Okla. – Today, Mark Verron Callshim, Jr., 38, of Tulsa, was sentenced for Robbery in Indian Country and Carrying, Using, and Brandishing a Firearm During and in Relation to a Crime of Violence. U.S. District Judge Sara E. Hill sentenced Callshim, to 184 months imprisonment, followed by five years of supervised release. This sentence is ordered to run consecutively to Callshim’s 20-year state sentence for aggravated assault and battery.

In September 2025, a federal jury convicted Callshim in the 2021 armed robbery of a convenience store in Tulsa. Surveillance video shown to the jury shows two men arriving at a convenience store in a blue vehicle. One man, later identified as Callshim, is seen wearing a black hoodie with the word “savage” on the front, a black Cleveland Indians hat, with visible neck and hand tattoos. Callshim and the other suspect are seen entering the store and pointing guns at the cashier. Visibly afraid of being shot, the cashier is seen pulling money out of the register and handing it over. The cashier then called 911, as Callshim is getting back into the driver's side of the blue vehicle and driving off while the other man fires one shot at the building.

Tulsa Police officers responded to the 911 call and set up a perimeter to canvas the area. The surveillance footage allowed officers to share a description of the two men seen in the video and of the blue vehicle. Shortly after the robbery, a citizen reported seeing a man in dark clothing abandoning the blue vehicle roughly a mile from the store. Tulsa Police officers looked up the VIN and found that the blue vehicle had been reported stolen a few days earlier. The detective contacted the victim of the stolen vehicle and explained that officers believed the vehicle was used in a robbery. The owner gave consent for the vehicle to be searched. While searching the vehicle, officers found a partially smoked cigarette, among other things. The items were collected as evidence and submitted for DNA analysis.

An internal tip sheet shared within the Tulsa Police Department led detectives to Callshim. Detectives later linked him to the robbery through his unique tattoos, shoes, and DNA evidence collected from the stolen vehicle. Court records show that Callshim has a lengthy criminal history. He’s been convicted of several crimes, including assault with a dangerous weapon, possessing controlled substances, eluding an officer, and first-degree robbery.

The second suspect in the robbery remains unknown. If you have any information about the second suspect, you can submit a tip to the FBI at tips.fbi.gov/home or by calling 405-290-7770. You can also submit an anonymous tip to Tulsa Crime Stoppers here or by calling 918-596-2677.

Callshim is a citizen of the Ponca Tribe of Indians of Oklahoma and will remain in custody pending transfer to the U.S. Bureau of Prisons. The FBI and Tulsa Police Department investigated the case. Assistant U.S. Attorneys Mike Flesher and John Brasher prosecuted the case.