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"Forensic Detection Dogs"
While many people think that all dogs used in law enforcement basically do the same job, in fact some have distinctly different
jobs than others. Dogs used for arson detection, for example, are trained differently than dogs used to track a suspect
or to find someone lost in the wilderness, and they may have to prove themselves under different conditions. They all
share certain specific traits, however. Working dogs in law enforcement are:
- Healthy
- Alert
- Trainable
- Manageable
- Eager to hunt
- High in stamina
- Not easily bored
- Focused
- Responsive to reward
Since they work as part of a team, the handler, too, needs to have certain traits, such as physical fitness, ability to
cope with what is found, ability to "read" the dog, ability to work with a forensics team, and a willingness to keep learning
and training
The dog's job is to find clues for the handler to interpret. Most importantly, they rely on their noses as the chief
means of detection. Humans have around 5 million olfactory receptor cells, while a German Shepherd Dog has appox
two hundred and twenty million. In other words, they're useful in this line of work because of their superior sense
of smell. Dogs can make distinctions between recent and older scents, and can detect a variety of odors under many different
types of conditions. Since scent is invisible, they can track and find things that no human could ever detect.Because
we leave a trail of minute particles of hair and skin ("scurf"), as well as sweat and other body oils, dogs can pick up our
scent. Dogs also make distinctions among scents, so they can focus on one even though others are present. They get a
"scent picture" or "scent print."
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WSCC CH HOOFPRINT FIN TAN FEARGHAS |
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Search and Rescue Dog Owned and Trained by Beth Barkley |
There are eight different programs
- Narcotics dogs (NDD): These dogs are used to find illegal drugs, quite often at
airport customs. The dogs sniff at luggage, boxes, and even at people carrying illegal narcotics. Their handlers
train them by placing narcotics in rags that the dog learns to fetch or find in a hidden place. The narcotics dogs associate
the drug with the "game," and eventually just look for the drugs. They learn to search persistently in all kinds of
places, and even to detect the scent of drugs overtly masked by other odors.
- Tracking dog: In the case of a known fugitive or a recent crime scene where the
suspect may not be far away, a tracking dog like a white german shepherd may be used. If there's a piece
of clothing, a car seat, or an item on which the subject left a scent, it's given to the dog and the dog then follows that
scent, if it's present. (There are even cases where the scent was picked up from the air.)
- Bomb detection dog (EDD): This dog is trained to search specifically for substances
used in explosive devices. The dog knows not to disturb the area, since the bomb might detonate. Instead, it will
just alert its handler to the bomb's presence. In cases when this job needs to be done in a hurry, such a dog is indispensable.
- Arson detection dogs: They're trained to indicate the presence of the types of accelerants
used to start and spread fires, such as gasoline or kerosene. When fire damages a large area and leaves a heavy smell
of smoke, it's difficult for humans to detect the fumes, but specially trained dogs have little difficulty indicating that
a fire was purposely caused.
- Search and Rescue dog (SAR): People lost in the wilderness require teams that
can work in many different types of rough terrain, such as rushing water and deep snow. Dogs like this must have agility
and confidence, as well as the ability to be in a boat. They are also strong swimmers and have plenty of stamina.
- Body detector dogs: They may be brought to an area of mass disaster, such as an
earthquake or building collapse where bodies are buried, or taken to hunt for a missing person. They're trained with
odors that smell like people, and they often find living victims. Some dogs respond best to the living and get upset
when they encounter a body, so when it's suspected that the missing person is dead, a more specialized dog may be brought
in.
- Cadaver dogs: These animals are trained to detect decomposition, so they're taken
out to hunt for missing people presumed dead, such as when a murderer confesses but cannot recall where he put the body.
Some are trained in special situation, such as hanging victims, submerged bodies, and swift water drowning. Essentially,
they're shaped to "possess" the scent the way a hunting dog would
- Human remains specialist dogs: They start as cadaver dogs but work at a more refined
level, in that they only alert handlers to the presence of some type of human remains.
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