(7) Identification of all persons officially present is required; only the
least number needed to help should be allowed to remain.
b. Searching the Scene for Evidence. Each crime scene is different. Therefore,
each must be processed differently.
However, MP crime scene processors should
proceed generally as follows:
(1) First, a general survey of the scene should be made. This should include
noting the location of obvious traces of the crime.
It should include also the
probable entry and exit points used by the offender, and the size and shape of the
(2) In rooms, buildings, and small outdoor areas, a systematic CLOCKWISE
search for evidence is begun.
(Any other systematic method may be just as
However, in the interest of developing a consistent method, it is
recommended that the clockwise movement be used.) This includes the floors, walls,
Each item found should be examined for evidentiary value.
Examination should ensure that the following steps are done:
(a) Protect fragile pieces of evidence.
These are those that may be
destroyed or contaminated if not collected and preserved when found.
may be collected earlier than the other evidence to prevent contamination.
However, first photograph the fragile evidence. Then record it in your notes.
(b) Doubtful items are considered as evidence until proven not.
(c) Items or areas where latent fingerprints may be present are closely
examined; action is taken to locate and protect all fingerprints.
(d) Protect any impressions of value as evidence.
photographs, sketches, casts, or molds can be made if needed.
(e) Stains, spots, and pools of liquid within the scene are treated as
though they are of value until proven not.
(f) Particular odors coming from the scene are noted.
(g) Hairs, fibers, and earth particles foreign to the area are handled as
(3) The search for evidence is initially completed when: a thorough
examination of the scene is done and a rough sketch is made; necessary photographs
and investigative notes must also have been made; the MP crime scene processors
have evaluated all evidence and statements.
(4) In large outdoor areas, divide the area into strips about 4 feet wide.
First, the strip on the left is searched, and then the adjoining strip; this
procedure is repeated until a thorough search of the whole area has been done. It
may take a long time to search a large area; however, it is a must