The AFOSI 11th Field Investigative Squadron is the lead military criminal investigative organization for all Joint Base San Antonio and is Region 4’s largest subordinate unit.
The 11th FIS capabilities include, but are not limited to, conducting major criminal investigations, protecting critical technologies and information, and detecting and mitigating threats to the installation and its personnel and resources.
The 11th FIS investigates a wide variety of serious offenses to include sexual assault, crimes against property, violence against people and violence escalation, crimes against children, suicide, homicide, larceny, desertion, computer hacking, espionage, terrorism, drug use and distribution, base level fraud, financial misdeeds, contract corruption, and any other illegal activity that undermines the mission and readiness of the U.S. Air Force or the Department of Defense.
The 11th FIS is comprised of three operational detachments that provide criminal investigations and counterintelligence support to the Joint Base San Antonio installation and its mission partners.
AFOSI Detachment 402 investigates felony criminal matters affecting JBSA-Lackland. AFOSI Detachment 403 is focused on force protection and counterintelligence (CI) support across JBSA and within their area of responsibility and is located at the JBSA-Chapman Training Annex. This detachment also has AFOSI Special Agents assigned to the Joint Terrorism Task Forces located at the Federal Bureau of Investigations’ San Antonio and Houston Field Offices.
AFOSI Detachment 404 investigates felony criminal matters affecting JBSA-Fort Sam Houston and JBSA-Randolph, Texas. The 11th FIS’ area of responsibility consists of 79 counties in southeastern Texas. Its primary customers are the 502nd Air Base Wing; 37th Training Wing; 59th Medical Wing; 24th Air Force; 25th AF; 12th Flying Training Wing; and National Security Agency Texas.
AFOSI-JBSA 11th FIS offices can be contacted at the following numbers:
- 11th FIS/Detachment 402, JBSA-Lackland: Commercial 210-671-4000 or 210-671-4231/2/3, DSN prefix 473
- AFOSI Detachment 403, JBSA-Chapman Training Annex: Commercial 210-671-9465/0921, DSN prefix 473
- AFOSI Detachment 404, JBSA-Fort Sam Houston/JBSA-Randolph: Commercial 210-652-1400