![]() In fact, we typically use a numbered system (one to four) of prioritising targets for dive teams to investigate. If the sonar and/or radar detects an object, specially trained victim recovery dogs may be deployed from the boat to detect any scent rising from a decaying body. If there’s a chance that the body could have sunk into soft sediment, a ground penetrating radar, which uses radar pulses to image the subsurface, could be placed at the base of a small boat to search for it. Sonar, a technique that uses sound propagation to search for objects underwater, may then be used from a boat or held by a diver to image the pond or lake bed. ![]() Typically, the first step when searching for a missing person that is suspected to have ended up in water is to employ old-fashioned leads from police or search and rescue operations – such as points of access to the crime scene or the kind of distance the perpetrator and victim could have travelled. ![]() These are common locations for bodies to end up in, due to their covert nature and ease of access without a boat. I specialise in the first set of locations: bodies in small, enclosed spaces. ![]() The techniques we use depends on the environment, ranging from ditches, canals and rivers to large lakes, estuaries and oceans. But by increasingly combining technology with traditional methods such as diving, we are getting better at it – greatly boosting our chances of discovering victims of homicide or accidental drowning. ![]() This kind of search is often challenging, as is the forensic recovery of a body. The operation follows an investigation by my colleagues and me, identifying five areas of interest in the canal. Police divers have started searching a canal in North Lanarkshire, Scotland, hoping to find the remains of schoolgirl Moira Anderson who disappeared, suspected murdered, in 1957. ![]()
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