John Cullen

Detective John D. Cullen began his law enforcement career in 1993 while attending the Northeast Florida Criminal Justice Training and Education Center in Jacksonville, FL.  In April of 1994, Detective Cullen was hired by the Jacksonville Sheriff’s Office.  After 11 months in the corrections division, he was assigned to the patrol division where he spent over five years working the midnight shift.  During this time, Detective Cullen performed routine patrol, and participated in tactical deployments involving robbery, burglary, and traffic.  Supervisors often called upon Detective Cullen to research, identify, and enforce traffic complaints.  Through these efforts, Detective Cullen routinely encountered suspected impaired drivers, and quickly became efficient in DUI investigations.  In September of 2001, Detective Cullen was given and accepted the opportunity to join the DUI Enforcement Unit of the Jacksonville Sheriff’s Office.  While serving in this capacity, he has received several awards for “Outstanding Performance in DUI Enforcement”.

In an effort to improve his DUI investigation skills, Detective Cullen has continued his law enforcement education by attending Standard Field Sobriety Training, DUI Instructor, Advanced Roadside Impaired Driving Enforcement (ARIDE), ARIDE Instructor, Drug Recognition Expert, and Drug Recognition Expert Instructor schools.   Since completing this training, Detective Cullen has been recognized as an Expert in numerous divisions of the 4th Judicial Circuit.

In July 2009, Detective Cullen transferred to the Department of Investigations and Homeland Security, where he currently works as a Homicide Investigator.  Detective Cullen still maintains an active role in DUI Enforcement and the Drug Recognition Expert Program.   Detective Cullen serves as the Drug Recognition Expert Regional Coordinator for Region 1 in Florida.

Detective Cullen routinely teaches for the Institute of Police Technology and Management (IPTM) and Northeast Florida Criminal Justice Training and Education Center.   He also speaks regularly to military groups, schools, and civic organizations about the dangers of impaired drivers.   Detective Cullen provides robbery prevention training to various businesses and financial institutions.

Course Expertise

  • Online Training
  • Traffic/DUI