Texas School District Police Chiefs' Association
Texas School District Police Chiefs' Association

Chief Solomon Cook, 
Humble ISD Police Dept.

Phone: 281-641-7902     Email: Solomon.Cook@humble.k12.tx.us                                                                                                                        

Chief Solomon Cook began his law enforcement career in 1976. For the past forty-one years, He has worked for municipalities, county and state agencies.  In 1997 Chief Cook joined the Humble ISD Police Department as Captain. He became Chief in 2004 with a staff 23 (16 peace officer) and in 2017 he has a staff of 82 (62 peace officers). Chief Cook has earned a Bachelor’s Degree of Science in Criminal Justice from Southwest University, a graduate of the FBI Command College and a FBI - LEEDA Trilogy Award recipient. Chief Cook’s certifications and licenses include a Master Peace Officer Certification, Police Instructor, Crime Prevention Instructor, Firearms Instructor, Defensive Tactics Instructor, ALERRT Instructor and Arson Investigations Certification. Chief Cook is a member of the Lone Star College Law Enforcement Academy Advisory Board. In 2015, Chief Cook was appointed by TCOLE to be chairperson for the HB 2684 committee, which created the foundation for the course curriculum for the School Based Law Enforcement Training. Chief Cook is a past president of the Houston Area Police Chiefs Association (HAPCA) and currently serves as the Houston Area Representative to the Texas Police Chiefs Association. Chief Cook had served as the Region 2 Director for the Texas School District Police Chiefs' Association.  In June of 2021 Chief Cook was elected President.

Chief Bill Avera, 
Jacksonville ISD Police Dept.

Phone:  903-589-2621      Email: isaac.avera@jisd.org

Chief Bill Avera was born in San Antonio, but has called East Texas home for most of his life. He is a graduate of Jacksonville (TX) high school and holds degrees from Lon Morris College, Sam Houston State University, and Texas A&M University - Commerce.

His law enforcement career spans more than 4 decades including service to the citizens of Jacksonville, Brownfield and Cockrell Hill. as Chief of Police.  Additionally, he served as an Assistant Chief of Police for Dallas ISD for 12 ½ years, helping to launch that Department. In August 2016, Avera was named Chief of Police and Emergency Manager for Jacksonville ISD,  his home district. Chief Avera holds the TCOLE Master Peace Officer, Master Telecommunicator, School Based Law Enforcement, Crime Prevention Inspector, Mental Health Officer, and Instructor certificates. Avera has served on several committees charged with developing curriculum for Texas SBLE and regularly presents to groups on matters of school safety. On July 6, 2021, Governor Greg Abbott appointed Chief Avera to the Board of Directors of the Texas School Safety Center. He is a member of the Jacksonville United Methodist Church Fellowship, the Jacksonville Rotary Club, Cherokee County Child & Family Service Board, Lakeview Methodist Assembly Board, and numerous professional organizations.  In 2013,  he was presented a Law Enforcement Lifetime Achievement Award. by the TXSSC. He is married to Heather who teaches high school math. The couple have two adult children. Chief Avera was elected 1st Vice President in 2021. 

​​Chief Kirby Warnke,
Corpus Christi ISD Police Dept.

Phone: 361-878-2851              Email: kirby.warnke@ccisd.us                                                        

Kirby is a graduate of A.C. Jones High School in Beeville, Texas. He holds the Bachelor of Science degree in Criminal Justice as well as the Master of Science in Occupational Training and Development from Texas A&M University - Corpus Christi. Chief Warnke began his career in law enforcement in 1991 with the Nueces County Sheriff's Department where he earned the rank of Sergeant before joining the CCISD Police Department during the 1997-98 school year. He served in every capacity with the CCISD Police Department before being named Chief of Police in July 2010. Warnke is a TCOLE Master Peace Officer as well as a certified instructor. He also holds the School Based Law Enforcement certification. The Chief serves in various capacities on several boards, both locally and statewide. He was appointed 2nd VP in 2022. 

Chief Charles McDuffie
​3rd Vice President
​Atlanta ISD Police Department

Phone: 903.796.4194         Email:  cmcduffie@atlisd.net

Chief McDuffie was born in Texarkana, Texas where he attended public schools and graduated from Texas Senior High School in 1985. Following his graduation from High School, he attended Northwestern State University, Chief McDuffie Graduated from East Texas Police Academy in 2005. 

He began his career in law enforcement in 2005, serving as a Police Officer until 2010. He then joined the  Texarkana Community College Police Department followed by the Liberty Eylau ISD Police Department.  In 2017, Chief McDuffie joined the Atlanta ISD Police Department assisting them in establishing an ISD Police department and presently serving that community as Chief of Police . During his tenure, he also served as a Varsity as girls Track Coach and mentor.  He currently holds TCOLE certifications as a Mental Health Peace Officer, School Based Law Enforcement Officer,  Homeland certified instructor as well as a basic physical defense instructor through RAD. Chief McDuffie is a member of TSDPCA, TPCA, Bowie County Child Welfare and volunteers annually as coach with NFL players football camp.  Chief McDuffie was appointed to 3rd VP in 2022.                                                                                                         

Chief Paul Cordova
​4thVice President
​Aldine ISD Police Department

Phone: 281-442-4923       Email:  pscordova@aldineisd.org

Chief Paul Córdova began his law enforcement career in 1982 at the Harris County Sheriff’s Office. While at the Sheriff’s Office, Córdova served in every civil service rank from Deputy to Senior Captain. Córdova fulfilled numerous assignments, including patrol, investigations, courtroom security, emergency management and homeland security. While in the Homeland Security Bureau, Córdova led the first Harris County SWAT Team, Hostage Negotiation Team, Marine Unit, Aviation Unit and Emergency Management. Córdova honorably retired from the HCSO in 2014 and accepted a position as a Police Captain with the Rice University Police Department. While at the RUPD, Córdova oversaw all areas of the department as second in command. In 2017, Córdova joined the Houston Independent School District as the Assistant Chief of Police, later becoming the Interim Chief of Police and Chief of Police within his first year. As the head of the largest public-school district police department in Texas, Córdova supervised 215 officers and was responsible for the safety and security of more than 209,000 students, 29,000 employees and 280 campuses. Córdova joined the Aldine ISD Police Department in May 2020 as Chief of Police. He holds a Bachelor of Science and a Master of Science degree in Criminal Justice from Sam Houston State University. Córdova is also a graduate of the FBI National Academy, LEMIT Leadership Command College, FBI LEEDA and FBI LEEDS.


Chief David Kimberly
​Immediate Past President
​Klein ISD Police Department

Phone: 832-249-4261      Email:  DKimberly@Kleinisd.net

Chief David Kimberly has served the citizens of Klein ISD as a district police officer since 1995. Prior to working for the Klein ISD Police Department, Chief Kimberly worked for the Montgomery County Constables Office Pct. 4.  In his tenure with the Klein ISD Police Department, he worked at all levels of the department including: Patrol Officer, Campus Officer, Sergeant, and Captain. He was promoted to the rank of Chief in February of 2014. Chief Kimberly holds a Master of Science Degree in Criminal Justice Leadership and Management from Sam Houston State University, a Bachelor of Science Degree in Criminal Justice from American Intercontinental University and an Associate of Arts in Business Administration from American Intercontinental University.  In addition, he also holds a Master Peace Officer Certification and is a certified Texas Commission On Law Enforcement (TCOLE)  Instructor.  Chief Kimberly is an active member in the Texas School District Police Chiefs’ Association, Houston Area Police Chiefs’ Association, Harris County Northwest Chamber of Commerce, Crime Stoppers of Houston, Mothers against Drunk Drivers (MADD) and the Boy Scouts of America Sam Houston Area Council.

Chief Jimmy Womack

Phone:  817-253-5902   Email:  Treasurer@texasISDChiefs.com

Chief Alan Bragg, ​


Cypress-Fairbanks ISD Police Dept. (Retired)

Phone: 832-510-3911       Email:  ChiefBragg@gmail.com

Chief Bragg has been a police officer since 1972 serving with the Wichita Falls Police Department, Midwestern State University Police Department and the Houston ISD Police Department.  In 1990, Chief Bragg was selected to create the Spring ISD Police Department which grew to a staff of 50 sworn officers. Chief Bragg assumed the Chief of Police position for the new startup Police Department in Cypress-Fairbanks ISD in January of 2012.

Chief Bragg is a graduate of the FBI National Academy, Class #201, and holds a Master Peace Officer Certificate from the Texas Commission On Law Enforcement.  He is past president of the Houston Area Police Chiefs Association and also served on the board of the Texas Association of School District Police since its creation.  Chief Bragg retired with 45 years of service on June 30, 2017.  Chief Bragg continues to provide consulting services to School District Police Departments and Districts seeking security and safety solutions through Alan Bragg & Associates School Safety Specialists, LLC and serves as Executive Director of the Texas School Safety and Security Council within PBK Architects, Houston.