Chief Knoll was born and raised in Shamrock, TX. She spent 6 years in the US Army Reserves. She joined the Cleburne Police Department in 1994. After several years in patrol, she was assigned to the Criminal Investigations Division where she was promoted to Corporal. Chief Knoll was the first female officer to achieve the ranks of Sergeant and Assistant Chief.
Chief Knoll holds a Master’s Degree in Public Administration from the University of Texas at Arlington. She earned a Bachelor of Science in Mathematics from West Texas A&M University. Chief Knoll is a graduate of the Leadership Command College of the Law Enforcement Management Institute of Texas.