Osage County Sheriff's Office Investation Division


Robert Testerman

Robert Testerman was raised in Newkirk, Oklahoma. Robert attended Northern Oklahoma College where he took courses in agriculture and business. He enlisted in the United States Army Reserve as a Military Policeman in 1998. Robert was called to active duty several times in the eight years he served. He was sent to El Salvador as part of Operation New Horizons, then Washington D.C. after the September 11 attacks where he served as law enforcement in Operation Noble Eagle. He was then deployed in combat operations in Baghdad Iraq as part of Operation Iraqi Freedom.

After leaving military service he began his law enforcement career at the Pawhuska Police Department in 2008. He then moved on to the Osage County Sheriff's Office in 2011. Robert served as a Patrol Division Deputy for over five years, primarily in the southern district of the county.

Robert was promoted to the Sheriff's Drugs and Violent Crimes Task Force in 2017. While with the task force he graduated the Criminal Investigation Academy 68, as well as graduating the Oklahoma Bureau of Narcotics and Dangerous Drugs Investigator course.

In November 2017 Robert was promoted to Sergeant and transferred to Patrol Division as shift supervisor. In September 2018 Robert was promoted to Investigation Division where he now serves. Robert has attended additional courses in investigation of crime to include Interviews and Interrogations, Essentials of Criminal Investigations, and Basic Crime Scene Response.


Steve Talburt

Steve Talburt has worked for at the Osage County Sheriff's Office since August 2005. Steve has worked several positions within the Sheriff's Office, including Patrol Deputy, Patrol Sergeant, and School Resource Officer. Steve was promoted to investigations and is currently working as an Investigator.

Steve began his law enforcement career with the Mannford Police Department before coming to Osage County Sheriff's Office. Currently, Steve is assigned as the Investigator for South Area of Osage County. Steve attended the Oklahoma Basic Police Academy (CLEET) in 2003. He has obtained certifications in advanced classes and specialized Investigation classes.

Steve has been the Reserve Coordinator for the Sheriff's Office since 2010. Steve currently oversees 25 Reserve Deputies which cover Sheriff's Office events and assist in the Patrol Division. Steve resides in Skiatook, Oklahoma with his wife Christina. Steve is also a Pastor at Faith Bible Church in Tulsa.

Steve can be reached by contacting the Sheriff's Office at 918-287-3131 ext. 265 or by email at stalburt@ocso.net.


Lt. Terry York

Lt. York has numerous credits and specialized training in the several areas of Law Enforcement not limited to the following:

  • DEA Lab Certified
  • Graduate of the Oklahoma Bureau of Narcotics Investigator Academy
  • Tactical EMT
  • Narcotics Assault and Clandestine Operations
  • Narcotic Financial Investigations
  • SWAT certifications
  • CLEET Certified Instructor
  • Active Threat Instructor
  • Rural Tactics and Operations

Lt. Terry York grew up in Shidler, Oklahoma. Terry began his career with the Osage County Sheriff’s Office in 2007 as a Field Patrol Deputy. Lt. York continued in Patrol before being promoted in 2015 to the 10th Judicial District Drug Task Force. Lt. York continued with the Drug Task Force until recently being assigned to Investigations and currently is head of Special Operations involving tactical or specialized responses to critical events or operations.