Okmulgee County Criminal Justice Authority


Executive Director & Chief of Law Enforcement

Shannon T. Clark serves as Executive Director (Chief Executive Officer) & Chief of Law Enforcement for the Okmulgee County Criminal Justice Authority. He has a combined 30+ years of experience in law enforcement and law enforcement administration. He holds a Bachelor of Science in Organizational Leadership & Management and minored with an Associate of Applied Science in Law Enforcement. He also is a state qualified Mediation Professional specializing in civil dispute resolution.

He is a certified instructor with the Oklahoma Council on Law Enforcement Education and Training (CLEET) and presents on a variety of curriculum in law enforcement, media relations, communication, and detention topics. He specializes in Critical Incident Counseling, Crisis Communications, Defensive Tactics, Criminal Investigation, and Adult Detention. He has presented for the Oklahoma Sheriffs’ Association, CLEET, the National Sheriff’s Association, American Correctional Association, National Institute of Corrections, American Jail Association, Large Jail Network, and countless other professional organizations. He has authored articles on adult detention and immigration enforcement. He has also been a featured guest on several local, state, and national media networks.

He is a graduate of the Institute for Law Enforcement Administration and Center for American and International Law 86th School of Police Supervision, the United States Department of Homeland Security Immigration and Customs Enforcement 287(g) National Academy, the Federal Bureau of Investigations LEEDA Executive Leadership program, The Oklahoma Sheriff’s Academy, the Oklahoma Police Chief’s Academy and holds an Advanced Law Enforcement Certification from CLEET. He has also served on numerous local, state, and national boards, committees, and non-profit advisory groups.


Deputy Executive Director and Deputy Chief of Law Enforcement

Christopher C. Cook is the Deputy Executive Director and Deputy Chief of Law Enforcement for the Okmulgee County Criminal Justice Authority. He holds a Batchelor of Science degree from Southern Nazarene University and is a graduate of the Federal Law Enforcement Training Center, Immigration Authority Delegation Program. Chris has instructor certification from the Oklahoma Council on Law Enforcement Education and Training (CLEET). and has been recognized by the American Correctional Association (ACA) and the Federal Emergency Management Agency (FEMA). With his previous roles, Chris was able to serve with our Federal partners at both the United States Marshals Service and the United States Department of Homeland Security. In the private sector, Chris has worked in sales, management, as a Training and Compliance Instructor, and in Corporate Security and Emergency Management. Chris has lectured both nationally and locally on topics ranging from law enforcement, corrections, to public and workplace safety.


Director of Operations

Leighton C. McComas currently serves as the Director of Operations for up to 100 employees in the Detention Department at the Okmulgee County Criminal Justice Authority (OCCJA) and has been in this position since December of 2016. With Ten years of experience in corrections, Mr. McComas specializes in crisis management and policy & procedure development for facility operations. In addition, Mr. McComas has facilitated several United States Marshal Contracts and the second Immigration and Customs Enforcement Contract in Oklahoma.

Prior to his position at OCCJA, Mr. McComas was employed for the Tulsa County Sheriff’s Office and worked as a Detention Officer from 2011 to 2013 and a Designated Immigration Officer from 2013 to 2016.

Mr. McComas graduated from the United States Department of Homeland Security Immigration and Customs Enforcement 287(g) National Academy in 2013 and received a bachelor’s degree of Applied Science in Criminal Justice from Indiana Wesleyan University in Marion, IN, in 2021.


Director of Community Relations

Jon Keim began his law enforcement career at the Okmulgee Police Department on July 16th, 1990. During his 30-year career, he served in various roles to include lake patrol, bike patrol, as well as heading up the School Resource Officer Program for the Okmulgee Public School. During his time as head of the School Resource Program he supervised six resource officers and worked with grades K-12th. Keim, who was also certified by NASRO (National Association of School Resource Officers), was invited by various school districts outside the Okmulgee area to instruct and help implement the SRO (School Resource Officer) Program in other schools. Keim was a patrol Sergeant for the last fifteen years before his retirement from the Okmulgee Police Department on August 28th, 2020. On August 31st, 2020, Keim began his new career at the Okmulgee County Criminal Justice Authority as Director of the Law Enforcement Division. Director Keim oversees operations for Training, Transportation, Investigations, and Correctional Emergency Response Team.


Director of Law Enforcement

Tim E. Lawson began his career as a Police Officer with the City of Sand Springs Police Department in 1985. In 1991 he continued his career with the Tulsa Police Department. During his 22-year career with TPD, he held numerous specialty assignments before being assigned to the TPD Training Division. Director Lawson was later reassigned to the Detective Division, where he investigated Sex Crimes before eventually coordinating Sex and Violent Offender Registration. Upon retiring in 2013, he took an investigator position with the Muscogee Nation Lighthorse, where he developed their Sex and Violent Offender registration program. In 2014 he took a position with Tulsa Community College, where he resigned as Captain with eight years of service to accept a leadership position with the Okmulgee County Criminal Justice Authority.

Director Lawson completed his Associate's Degree from Rogers State College and has since acquired 112 hours towards a bachelor's degree. Furthermore, he is a certified CLEET instructor, Crime Prevention Specialist with an emphasis on Crime Prevention Through Environmental Design, Corner House trained forensic interviewer, LEDT instructor, OK SDA/NRA firearms instructor, Mental Health First Responder, and has completed the Tulsa Community College Leadership Program, the International Association of Chiefs of Police Leadership Academy, and the FBI Leadership Trilogy.