Show-Me State Times

A member of the Pagan’s Motorcycle Club has pleaded guilty to his role in a violent assault against a rival motorcycle club member. Mark A. Crump, also known as “Navajo,” age 55 and from Lee’s Summit, Missouri, entered his plea before U.S. District Judge Greg Kays to one count of assault resulting in serious bodily injury in aid of racketeering.

According to court records, on July 20, 2023, Crump joined Jarrid A. Hammer and another Pagan’s member in attacking a rival gang member at a bar and grill located in North Kansas City, Missouri. The incident began when Hammer told the victim that they intended to shut down the victim’s club before flipping over a table and knocking the individual to the ground. Once the victim was down, all three assailants began stomping, kicking, and punching him.

The victim later reported to law enforcement that those involved were wearing steel-toed boots during the attack. Crump and his associates left the scene before police arrived. The assaulted individual was taken by ambulance to a local hospital where he was treated for multiple injuries including a head contusion (bruise on the brain), rib fracture, hemothorax (blood accumulation between chest wall and lungs), left pulmonary contusion (lung bruising), pneumothorax (collapsed lung), and traumatic brain injury.

Hammer previously pleaded guilty on June 18, 2025, for his part in the assault and is awaiting sentencing.

Crump faces up to 20 years in prison without parole under federal statutes. Sentencing will be determined by the court after considering advisory guidelines and statutory factors following a presentence investigation by the United States Probation Office.

Assistant U.S. Attorneys Bradley K. Kavanaugh and Robert Smith are prosecuting this case. The investigation involved several agencies: FBI, Independence Police Department (Missouri), Blue Springs Police Department (Missouri), Homeland Security Investigations, and Kansas City Police Department (Missouri).

This prosecution falls under an Organized Crime Drug Enforcement Task Forces (OCDETF) operation—a multi-agency effort aimed at dismantling high-level criminal organizations threatening public safety across the United States through coordinated intelligence-led investigations. More details about OCDETF can be found at https://www.justice.gov/OCDETF.

"This case is being prosecuted by Assistant U.S. Attorneys Bradley K. Kavanaugh and Robert Smith. It was investigated by the FBI, the Independence, Mo., Police Department, the Blue Springs, Mo., Police Department, Homeland Security Investigations, and the Kansas City, Mo., Police Department."