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freezer is mainly used to preserve human tissue, blood, bodies,
body parts, etc., not objects.
If you collect forensic information, especially artifacts containing
biometric data, hand these materials over to official investigators at
the earliest possible time. Remember that you do not possess the
training or ability to handle and preserve this information
appropriately, and that collection/efforts of preservations should at
all times be weighted against the possibility of tampering with the
value of this evidence, or spoiling it altogether.
If more than one item is to be collected, give each item a unique
reference number before collecting it.
A item reference number is the identification number assigned to
each item of evidence. It is unique to each item, is assigned when
processing the crime scene and remains unchanged throughout the
chain of custody process. It can start at 1 or A and proceeds
sequentially when reference numbers need to be given to
additional items being collected. When there is a significant
number of items alphanumeric designation is also a possibility.
Bag and seal each item individually and include a statement
detailing exactly what, when, where, by whom it was collected,
including the item reference number, if applicable.
See the Chain of Custody sections (Sections 2.1.8 and 3.1.1) as
well as the Appendix for template chain of custody forms.
Remember, while it might be allowed to handle artifacts if no
professional investigator is available and the artifact runs the risk that it will
otherwise be lost or damaged, under no circumstances should be unofficial
investigators handle organic forensic material such as semen, blood, hair,
skin, etc.
Firearms and Associated Material
Unofficial investigators may encounter firearms, cartridges, casings,
and bullets. Safety should always be the primary consideration. Unofficial
investigators’ own safety as well as the safety of victims, witnesses, and the
public take precedence over gathering information. Therefore anyone
without appropriate training must leave the handling of firearms and
associated material to professional investigators.
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