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Board Members
President: David Dickinson- Moore PD
ddickinson@cityofmoore.com
1st Vice President: Rhianna Russell- Broken Arrow PD (Ret.)
2nd Vice President: Nicole Flemming- Dept. of Corrections
nicole.fleming@doc.ok.gov
Secretary: Vacant
Treasurer: Dan Mathews - Woodward PD
dmathewswpd51@yahoo.com
Public Relations Director: Deny Oesterling- Norman PD
deny.oesterling@normanok.gov
Presidents:
2017 - David Dickinson, Moore PD
2016 - 2017 Paul Priegel, Stillwater PD
2008 - 2016 Michael Heath, Norman PD
MSgt David Dickinson has been with the Moore Police Department for 18 years, with 17 of that being a crisis/hostage negotiator. He has served as a Team Leader for his department the past twelve 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.
Detective Rhianna Russell has been with the Broken Arrow Police Department for 24 years and a Crisis Negotiator for the last 19 years. She has been the Assistant Team Leader for her team the last eleven years. Det Russell first served as a Regional Representative in 2016 and became First Vice President in 2018. She attended the NTOA Annual Conference for many years. Det Russell has a B.A. in Criminal Justice and Psychology from Northeastern State University. She attended the FBI Basic Crisis Negotiations Course in 2005.
Nicole Flemming is a ten-year employee with the Oklahoma Department of Corrections (ODOC). She has served eight years as a crisis negotiator. Ms. Flemming joined CNOK in 2016, was elected Secretary in 2018, and 2nd Vice President in 2022. Ms. Flemming studied at California State University, Stanislaus, and Ashford University, where she holds a B.A. Degree in Social Science. She attended the FBI Basic Crisis Negotiations Course in 2017.
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.
Lt. Deny Oesterling has been with the Norman Police Department for 15 years. He has been a crisis/hostage negotiator for 7 years and currently serves as the Negotiation’s Team Lead. Oesterling has been with CNOK since 2016 serving as the Public Relations Director. He served in the Air Force as an Airborne Surveillance Technician on the AWACS and holds an Associate’s Degree in CyberSecurity from Rose State College. Oesterling attended the FBI Basic Crisis Negotiations Course in 2015.
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