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Underwater Crime Scene Investigation

Searching for Key Evidence? Aqua Survey locates high-risk and high-value metallic objects underwater, such as firearms and knives that have gone missing and may be deeply embedded within the sediment.

Why Aqua Survey?

Finding things that have gone missing underwater is Aqua Survey’s specialty.  Aqua Survey uses the same equipment in criminal investigations that they use in locating submerged and sediment buried unexploded ordnance. 

The Department of Defense trusts us to find live bombs. 

You can trust us on your case.

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Side Scan Sonar and ROV Video Have Their Limits

If a pistol has just been tossed into a water body and there isn’t much wave action or the sediment isn’t too soft, it’s possible to use conventional investigation methods such as side scan sonar or an ROV’s video camera to find the evidence.  It’s a scientific fact that knives, handguns and other metal evidence will settle through sand and mud because of their higher specific gravity.  Due to water currents, crime scene evidence, just like your feet at the edge of the ocean, disappears into the bottom in minutes or hours, usually not days.

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Magnetometer and Hand Held Detectors Also Have Their Limits

If wave and current action cause the pistol to bury itself in the bottom, a magnetometer can sometimes be used to find it, providing there isn’t metal debris clutter or major metal infrastructure such as a bridge in the area.  If the area to investigate is small, a handheld metal detector might work to find shallow buried metallic objects.  However environmental obstructions coupled with poor detection ranges can often render handheld metal detectors ineffective and even useless.

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Enter Aqua Survey

The use of EM detectors to locate metallic crime scene evidence overcomes the obstacles listed above. EM coils look directly below the coil thus eliminating issues of working close to bridgeworks and other metal structures. Aqua Survey’s EM coils are 1 or 2.5 meters (3 to 8 feet) wide and can survey a large area quickly.  They can detect a handgun buried several feet below the pond’s bottom.  By using survey-grade precision-positioning electronics while conducting the survey, the survey data can be processed after completion of the survey, a target investigation list can be developed and the crime scene investigators can quickly reacquire the target and intrusively investigate each pinpointed target.

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Learn More

Watch: “Amityville Horror” Handgun Recovery

Read: “CASE STUDY: Amityville Handgun Recovery”

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