Crime Scene Forensics - Finding Shoeprints as Evidence

"Maybe you remember the Russian fable Cinderella. Ifbeen burglarized, CSI's focus their search in those
the shoe fits, wear it."-Chekhov, Star Trek VI: Theareas. Following the exit path can indicate to CSI's
Undiscovered Countrywhere the crook tossed the weapon or pieces of
Crooks many times find themselves heading straightclothing, such as a mask or gloves. The best evidence
for prison if it is found that their shoe fits. Shoeprintstends to be found when retracing a crook's path.
and impressions are very useful to criminalA shoeprint also can link a crook to several crimes.
investigators for a variety of reasons. For one, not onlyFinding the same prints at several different crime
can they show that a particular person was at thescenes suggests that the same crook may be
scene of the crime, they may also confirm or deny ainvolved in each crime. This association many times is
perpetrator's alibi. For instance, suppose a neighborsignificant to solving the crimes. Each individual crime
claims that when he went next door to borrow a cupscene may provide other evidence that when taken
of milk, he found the lady who lived there lying on theby itself is of no use, but when combined with
living room floor beaten to death. He mentions that theevidence from the other scenes may become crucial.
door was unlocked, so he checked for the woman'sFor instance, suppose that CSI technicians find a blond
pulse, called 911, and waited for the authorities to arrive.piece of hair at one crime scene, brown carpet fibers
The neighbor says that he went nowhere in the house.from a Toyota at another, and, blood spatter patterns
If crime scene investigators (CSI's) discover thethat indicate that the killer was right-handed and about
neighbor's shoeprint on a piece of newspaper, lying onsix feet tall at a third crime scene. If viewed individually,
the floor of the woman's closet next to her emptyeach item of evidence tells investigators little about the
safety deposit box, his story will not jibe with thecrimes, but when the same prints link the crimes and
criminal investigators.suggest that the same individual committed all the
Prints can also be indicative of the points of entry andcrimes, a much clearer image is revealed. That picture
exit at a crime scene. Shoeprints found in the soft soilis of a six-foot-tall, right-handed man with blond hair
of a flower bed underneath the pried-open windowwho drives a Toyota with brown carpet. Although this
and matching dirt and grime prints on the floor insideprofile does not provide enough conclusive
the house suggest the point of entry. Prints filled withidentification, it, however, builds a better description of
blood pointed out through the rear door indicate thethe perpetrator.
point of exit. Shoeprints left on the tile or woodenMultiple shoeprints can suggest whether more than
floors, countertops, ladders, stairs, windowsills, andone person is involved and may even help determine
even chair seats may reveal the crook's movementsexactly how many. When CSI technicians find three
within the house.distinct types of prints, they can say that at least three
Following the shoeprints through a crime scene assistspeople are involved. More people may have been
CSI's to narrow their search for evidence. When printsinvolved in the crime but failed to leave behind any
are found in more than one room of a house that hasshoeprints.