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

Headquarters Region 4 is a wing-level unit located at Joint Base San Antonio-Randolph, Texas. It provides leadership, oversight and support to all Air Force Office of Special Investigations units located on Air Education and Training Command 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  (commercial) 210-652-6152, DSN prefix 487.


AFOSI 11th Field Investigations Squadron

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

AFOSI offers fraud safety, prevention guide

The Air Force Office of Special Investigations 11th Field Investigative Squadron at Joint Base San Antonio offers tips on fraud safety and prevention:

Protect your Identity:

  • Shred discarded mail with any personal information on it. Go “paperless” if possible.
  • Don’t use public Wi-Fi for any personal info (banking, email, etc.).
  • Don’t use the same password for multiple accounts, make passwords hard to guess
  • Do not open links or email attachments from unknown sources.
  • Verify someone is who they say they are. Ask for names/credentials, hang up and call the company if someone calls asking for you to verify your information.

Social Media/Internet:

  • Don’t post personal information.
  • Keep accounts private.
  • Don’t add or converse with anyone you don’t know.
  • Keep a close eye on what your kids are doing and ensure they are following the same principles.
  • Don’t post your locations, makes it easy for someone to follow you.
  • Do not click on links in text messages or emails from unknown sources. Always verify the source first.

Crisis and Disaster Donations:

  • Soliciting donations for false charities, copycat charities or with a similar name to popular charities. Most charities use .org websites and not a .com. Use Federal Trade Commission resources to track a charity’s record before donating.


  • Websites or emails posing at the Centers for Disease Control and Prevention looking to track COVID-19 and asking for personal and health information. Do not click on any links or give any information.

Business Fraud:

  • Pyramid schemes. Don’t invest in a business that requires upfront purchases and promises guaranteed returns. Nothing in business is guaranteed. Choose wisely.


  • Scammers replace the credit/debit card scanners at gas pumps and ATMs to send information to their devices. Always check if it’s loose or looks tampered with before swiping your card or going inside to pay.


  • Usually occurs in an online chat room. The fraudster will chat with someone and send nude images or videos pretending to be an attractive person interested.
  • The victim will send pictures or images back and then the fraudster will screenshot, usually saying they are a minor and threaten to notify law enforcement or send the images to a family member if you don’t send them money. They will know your family members' actual names.
  • One payment is never enough, they will make other claims and make you keep sending money. Don’t provide any money. Write down the username, weblink, and any information you possibly can and notify law enforcement.

Employment Scams:

  • People will post job advertisements to common places like Indeed or Jobs.com posing as an employer. They will go through the whole application process online, through telephone interviews, and through the paperwork. They may ask you to go purchase electronics, provide receipts for reimbursement, and send in the electronics to get specific software added. Victims will never see the products again.
  • Another way is the “employer” will ask for banking info to wire money for you to purchase the equipment needed to start work. The fraudster quickly drains the bank account, never to be found again.

Wire Fraud:

  • Someone claiming to be a government official saying they need money to get you or someone you know out of trouble. Example: someone calls you claiming to be a corrections officer and says they have your family member in jail and need bail money. Ask the name of the jail and tell them you’ll call back after getting your bank information. Hang up and look up the actual jail number and call. 99.9% of the time no one you know will be in jail.
  • Extending your vehicle warranty over the phone.
  • Someone claims you have a warrant for your arrest. They usually need you to verify your information and then tell you to pay over the phone or else you’ll be arrested. Ask for the department, look up the number yourself and call back before verifying any information.
  • “Nigerian Prince” claims they will send you money when in return they will drain your bank account when you give your bank information.

For more information visit the FBI website at https://www.fbi.gov/scams-and-safety/common-scams-and-crimes.

AFOSI 3rd Field Investigations Squadron

The AFOSI 3rd FIS is located at the JBSA-Chapman Training 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. 

The 3rd FIS is closely partnered with Sixteenth Air Force (Air Forces Cyber) and conducts cyber threat pursuit activities vital to the national interest.

Office of Procurement Fraud Investigations, Detachment 3

The Office of Procurement Fraud Investigations, Detachment 3, is located in a Government Services Administration (GSA) facility in downtown 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, Texas; Kirtland Air Force Base, New Mexico; and Davis-Monthan Air Force Base, Arizona. 

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 U.S. Air Force 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 Sixteenth Air Force/Air Forces Cyber.    

Det. 3 can be contacted at (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, or SAPs, and performs program security, inspections, investigative and counterintelligence functions for all SAPs. 

Det. 8/OL-B is an operating location of its parent detachment located in Westlake, Texas, and is located in Building 1 at JBSA-Kelly Field Annex.

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 Air Force Centers, and more than two dozen military and industry elements.

Contact Information

AFOSI seeks agents