Modus Operandi File.
The modus operandi file is used to record each instance or
investigation that involves a known or unknown subject who has left a distinctive
or peculiar method of committing the offense. The information is recorded on 5" x
8" file card (see Figure 2-23) and is kept in the modus operandi file. This type
of file will help identify crime patterns and possible suspects.
Modus operandi searches are useful when checking unresolved crimes of the following
Bad check writing.
Certain sex offenses.
Investigators should inform CRC of cases of this type. Investigators will conduct
a search to determine if crimes of a similar modus operandi have occurred in the
past year or two. It is possible that CRC may provide an investigative lead on an
The modus operandi file will be maintained by the local USACIDC office.
Modus Operandi File Cards.