KC Reporter

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

According to court documents, the incident took place on July 20, 2023, at a bar and grill in North Kansas City, Missouri. Crump, along with Jarrid A. Hammer and another member of the Pagan’s Motorcycle Club, confronted a lone rival club member. Hammer reportedly told the victim that they were there to shut down his club before overturning a table and knocking him to the ground. The three then proceeded to stomp, kick, and punch the victim while he was on the floor.

The victim later informed law enforcement that his assailants wore steel-toed boots during the attack. Afterward, Crump and his associates left the scene before police arrived. Emergency services transported the victim to a local hospital where he was treated for several 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.

Jarrid A. Hammer previously pleaded guilty to his role in this assault on June 18, 2025, and is awaiting sentencing.

Crump could face up to 20 years in prison without parole under federal statutes; however, actual sentencing will be determined by the court after consideration of 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 FBI led the investigation with support from local law enforcement agencies including those in Independence and Blue Springs as well as Homeland Security Investigations and Kansas City Police Department.

This prosecution is part of an Organized Crime Drug Enforcement Task Forces (OCDETF) operation aimed at disrupting major criminal organizations through coordinated efforts among multiple agencies. More details about OCDETF are available at https://www.justice.gov/OCDETF.