Headquarters Air Force Office of Special Investigations (AFOSI) 4th Field Investigations Region

HQ Region 4 is a wing-level unit located on Joint Base San Antonio-Randolph, Texas.  It provides leadership, oversight and support to all AFOSI units located on AETC installations.  It is the conduit to the AETC leadership/staff and works to ensure investigations and operations support and enhance commanders’ mission requirements and readiness.

AFOSI Region 4 can be contacted at the following number: Commercial 210-652-6152, DSN prefix 487


AFOSI 11th Field Investigations Squadron

AFOSI 11th FIS is the lead military criminal investigative organization (MCIO) for all Joint Base San Antonio and is Region 4’s largest subordinate unit.  

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. 

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 US 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 on the JBSA-Lackland, Median Complex.  This detachment also has AFOSI Special Agents assigned to the Joint Terrorism Task Forces located at the Federal Bureau of Investigations’ (FBI) San Antonio and Houston Field Offices.  AFOSI Detachment 404 investigates felony criminal matters affecting JBSA-Fort Sam Houston and JBSA-Randolph TX.  11th FIS’ area of responsibility consists of 79 counties in Southeastern Texas.  Its primary customers are: the 502nd Air Base Wing (ABW); 37th Training Wing (TRW); 59th Medical Wing (MDW); 24th Air Force (AF); 25th AF; 12th Flying Training Wing (FTW); and National Security Agency (NSA) 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

Detachment 403, JBSA-Medina Annex: Commercial 210-671-9465/0921, DSN prefix 473

Detachment 404, JBSA-Ft Sam Houston: Commercial 210-295-0594

AFOSI 3rd Field Investigations Squadron

AFOSI 3rd FIS is located on the JBSA-Medina Annex. 

It is a specialized unit with a diverse mission portfolio.  As the largest AFOSI squadron, it delivers specialized investigative activities, strategic surveillance, cyber threat pursuit, insider threat information, and expert analysis to support global Air Force and DoD interests. 

Due to its proximity to several AFOSI units in JBSA, 3rd FIS routinely supports complex and high visibility investigations that impact all JBSA installations.  Forensics science consultants advise on and participate in crime scene processing of all types, to include sex assaults, suicides and homicides, and child abuse matters.  Digital forensics consultants exploit all types of media, recovering and extracting vital electronic information, very often recovering evidence of criminal activity used to find the truth in an investigation.  Polygraph examiners identify and neutralize potential insider threats.  Technical Services Operations Special Agents create techniques, solutions, and improvised devices to support complex JBSA investigations.  3rd FIS is closely partnered with 24th and 25th AF and conducts cyber threat pursuit activities vital to the national interest.

Office of Procurement Fraud Investigations, Detachment 3

PF Detachment 3 is located in a Government Services Administration (GSA) facility in down-town San Antonio. 

It is charged with identifying, exploiting and neutralizing major procurement fraud, waste, and abuse to Department of the Air Force and Department of Defense acquisition programs within a four state geographic region of Texas, New Mexico, Arizona, and Louisiana. Det 3 has operating locations in: San Antonio and Dallas/Arlington, TX; Kirtland AFB, NM; and Davis-Monthan AFB, AZ. 

Det 3 detects and deters economic crime stemming from centralized procurement activities (e.g. service-wide or MAJCOM-wide acquisitions) and/or major procurement crime affecting USAF weapons systems at any point in the acquisition life cycle. The unit specifically focuses on all major procurement acquisition systems to include Special Access Programs (SAPs) and Sensitive Compartmented Information (SCI). Det 3 assesses trends and makes recommendations to protect the U.S. Air Force from losses due to fraudulent schemes, diversion, and misuse of Air Force monies while ensuring the safety and reliability of equipment, operations, programs, and weapons systems. 

To best achieve these effects, Det 3 has numerous key customers located across JBSA including the Air Force Installation and Mission Support Center (AFIMSC), Air Force Civil Engineering Center (AFCEC), HQ Air Force Medical Operations Agency (AFMOA), HQ AETC Contracting, and the 24 and 25 Air Force.    

PF Det 3 can be contacted at the following numbers: Commercial 210-348-6426/6918/6929

Office of Special Projects Detachment 8/OL-B

The AFOSI Office of Special Projects is responsible for all Air Force Special Access Programs (SAPs) and performs program security, inspections, investigative and counterintelligence functions for all SAPs. 

PJ Det 8/OL-B is an operating location of its parent detachment located in Westlake, TX, and is located in Building 1 on Kelly Field.

It is responsible for the protection and security of various special projects and activities located in the southern United States as well as investigations of personnel with access to those programs.  As such, PJ Det 8 OL-B is an advisor to PJ Det 8 and the AFOSI PJ Director, who is the principal advisor to the Secretary of the Air Force/Inspector General for SAPs. 

Det 8/OL-B, with a geographic area of responsibility across the southwest district of the United States, is directly integrated with four MAJCOMs, three Numbered Air Force commands, two AF Centers, and more than two dozen military and industry elements.

Contact Information