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Board Members
President: David Dickerson - Moore PD
MSgt David Dickinson has been with the Moore Police Department for 19 years, with 18 of that being a crisis/hostage negotiator. He has served as a Team Leader for his department the past thirteen years. Dickinson has been with CNOK since 2016; first as a Vice President, and President since 2017. He is retired from the Air Force, and holds a B.A. Degree in Management from the University of Maryland, and a M.A Degree in Criminal Justice from the University of Central Oklahoma. Dickinson attended the FBI Basic Crisis Negotiations Course in 2009.
Contact: ddickinson@cityofmoore.com
Rhianna (Rhi) Russell retired from the Broken Arrow Police Department in 2025 after 24 years with 20 years as a Crisis Negotiator and Assistant for her team twelve years. Rhi first served as a Regional Representative in 2016 and became First Vice President in 2018. She attended the NTOA Annual Conference for many years. Rhi has a B.A. in Criminal Justice and Psychology from Northeastern State University. She attended the FBI Basic Crisis Negotiations Course in 2005.
1st Vice President: Rhianna Russell - Broken Arrow PD (Ret.)
Nicole Flemming serves as the Crisis Negotiation Coordinator for the Oklahoma Department of Corrections (ODOC) and has been an active crisis negotiator since 2015. She joined the Crisis Negotiators of Oklahoma (CNOK) in 2016, was elected Secretary in 2018, and later served as 2nd Vice President beginning in 2022. Ms. Flemming holds a Bachelor of Arts degree in Social Science and completed the FBI Basic Crisis Negotiations Course in 2017.
Contact: nicole.flemming@doc.ok.gov
2nd Vice President: Nicole Flemming - Dept of Corrections
Secretary
Vacant
Treasurer: Dan Mathews - Woodward PD
Detective Lieutenant Dan Mathews has been with the Woodward Police Department for over 16 years of his 29 years of law enforcement. He served in the Guymon, Seiling Police Departments, and the Dewey County Sheriff's Department. Mathews has been with CNOK since 2006, first serving as Region 1 Director, and currently as Treasurer since 2020. Det. Lt. Mathews attended FBI Crisis Negotiation class in 2006.
Contact: dmathewswpd51@yahoo.com
Public Relations Director: Janelle Williams - Dept of Corrections
Janelle Williams has been with the Oklahoma Department of Corrections (ODOC) for 6 years, serving as their Digital Content Manager. She was with the Oklahoma Bureau of Investigation for 8 years, serving as a Web and Collaboration Specialist before moving into the role of Accreditation Manager.
Contact: janelle.williams@doc.ok.gov
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