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About Us

Founder, Gregg Shannon, got his start in the industry working as an undercover agent at the age of nineteen for the renowned  Pinkerton Agency (the founder of what's now known as the U S Secret Service) while attending Golden West College in Huntington Beach, California.  After graduating, he continued working for various companies in an effort to become fully versed in all aspects of investigations, including criminal defense, as well as both civil defense, and plaintiff investigations.  In 1988, Gregg Shannon became a supervisor of an investigation agency in Sherman Oaks, California and was later promoted to start and manage a branch office in San Diego, California.  Gregg Shannon ran the entire division at this branch office for two years.  In 1991, he completed his apprenticeship and started his own business in San Diego, California.  A year later he moved the business operation to Scottsdale, Arizona to better serve the entire Southwestern US.  In 1993, Gregg Shannon began serving the Pacific Northwest areas of the US and now services the entire western United States and can also accept special assignments in the Midwest and East Coast.

Unlike most large investigative agencies who assign their work out to other, less-experienced investigators, Gregg Shannon primarily performs his investigations himself, investing his years of expertise in every case.  

Shannon Detective Service uses state-of-the-art surveillance equipment and is always updating the equipment to keep pace with technological advances.  

• We utilize night vision IR illuminators that will enhance what we can see in total darkness up to 100 yards with IR sensitive CCTV box cameras which have the ability to use various interchangeable C-mount zoom lenses, we use night vision fire-flies to help track mobile or stationary targets, we use micro 3G video phone call cameras that can monitor live activity or even call the user via their cell phone when activity is present (motion detection) eliminating the use of extra manned operatives.  In remote areas outside of cell phone coverage we can use remote fixed cameras that use from .5 to 2 watt transmitters and receivers to send wireless video signals over long distances on the 1.2 GHz band when legal (to minimize interference at long ranges and eliminating unwanted monitoring in comparison to the saturated 2.4 GHz band) and we use hidden HD hard-wired cameras disguised in a remote key-chain and a ball point pen that is also functional.
• Our mobile surveillance vehicles deploy the Mintron MG5 10 bit DSP 3 mega pixel CCTV (1080p) camera with 3G-SDI cabling (serial digital interface) attached to a Tokina 16-160 mm lens that has an auto iris and a manual zoom & focus for day use.  The lens can house a 2X converter for doubling the magnification and has an "F"-stop of 1.8.  We also deploy this lens on a mini CCTV night camera that has 600 lines of resolution  (508 V X 811 H) and a low lux rating of .00001 which can optimize near dark conditions without  an IR illuminator.  We only use optical lenses to avoid distortion experienced with digital cameras and or lenses.  Our cameras can also utilize interchangeable lenses such as our vari-focal 100-500 mm lenses that can also accommodate a 2X converter that increases the zoom to a 200-1000 mm lens thus allowing a subject to be placed under surveillance from a far distance to avoid detection.   We use the professional Panasonic AG-HMR10 hand-held mobile AVCCAM recorder with a built-in HD monitor that records live HD video (30 fps) at 1080p (broadcast quality) onto a SD memory card. This recorder can be programmed to stamp the time and date and include the GPS location site where the video was obtained.    
• When permissible, we use GPS tracking surveillance equipment to tail hard to follow subjects; or when previous agencies have been exposed to the target.  Most other agencies will opt to deploy multiple investigators to follow these difficult subjects, however our approach eliminates the need for this and saves you money.  We also use magnetized business signs on our vehicles to disguise our appearance and help us blend into neighborhoods and avoid detection.    
• For special assignments, buildings, houses and individuals can be watched live with the new technology of the micro 3G video phone call cameras eliminating IP (internet protocol) systems.  This new technology allows users to receive text messaging notifications when motion is detected or be watched live by the user's cell phone.  The cameras operate with a sim card on the 3G network that can be monitored anywhere in the world.  Other cameras, (including hidden)  we use and sell can record video with sound on a SD card and can utilize interchangeable lenses for any application including IR capabilities or low lux ratings of .0001.  Depending upon the lens used, zoom and focus can also be controlled via the users cell phone that are pin coded for security.  
• We can use modern technology to locate a subject's physical address who is avoiding detection by "pinging" their cell phone.  This is done by accessing the users gps chip in their cell phone undetected, (only needing their phone number not their phone) that will give the exact location at the time the pinging occurs.  This can be used to assist in the location of a child runaway or abduction and to uncover a suspicious insurance claimant's  workplace when tracking equipment is illegal to use.  *Note the phone does not need to be on only attached to the battery.  

Shannon Detective Service does not charge for surveillance time of lost subjects due to the help of this advanced technology. 

We have contacts throughout the United States and abroad to help gather information through in-depth computer searches with extensive networks that prove especially valuable for missing persons cases, lost heirs, relatives and old lovers.  

We are able to obtain addresses to unpublished telephone numbers and can locate cell phone numbers in order to locate hard to find individuals.  We can also perform various utility searches to locate witnesses and former policy holders, including claimants who use P.O. boxes or lists their attorney's as their contact address. 

Shannon Detective Service has experience with assisting city & county district attorneys, US & state attorney general offices, the FBI and department of insurances in numerous states with preparing cases for prosecution.  We have extensive experience working with Special Investigation Units for insurance companies, self insured's and third party administrators in the solving of insurance fraud claims related to workers compensation, property & casualty, auto claims and disability insurance policies.  We have testified in numerous civil suits (plaintiff & defense), criminal suits (for law enforcement and defense council) and workers compensation courts (for defense council).  Our expertise in these fields means you can rely on us to be there for you when court testimony finally occurs.