The section is staffed by professional law enforcement personnel who are dedicated to bringing cases to a successful conclusion and are responsible for all crime scene processing, photography, forensic evidence gathering and handling, and the investigation of approximately 250 incidents per year, and this figure is ever increasing. "Incidents" typically are major investigations that range anywhere from thefts, burglaries, robberies, computer crimes, fraud, identity theft, sex offenses, crimes against children, high level assaults, homicide, suicide, and narcotics violations.

The section also conducts extensive background investigations for applicants, handle all Internal Investigations dealing with complaints against employees, and maintain the strict measures for the receipt, handling, security, preservation and disposition of all property and evidence. Additionally, the section conducts checks and follow-up investigations to ensure that sexual offenders residing in the unincorporated areas of the county are in compliance with the Texas Sex Offender Registration Program, and secure criminal charges as warranted.

During large scale criminal investigations, Investigators often work in collaboration with other area, state and federal law enforcement agencies in order to pool resources and effectively solve crimes, apprehend high-threat criminals, dismantle organized criminal organizations, and reduce the threat of mass attacks in public places.