Features to look at:
(1) postage
(2) addressee
(3) other findings
Postage - one or more of the following:
(1) stamps rather than metering (a postal worker might recognize the person sending)
(2) excessive postage
(3) foreign postage
(4) foreign cancellation stamp
Addressee:
(1) wrong title
(2) misspelled name or address
(3) poorly typed or written
(4) designated "confidential", "personal", or "only to be opened by" a specific person
Other:
(1) return address absent or in error
(2) excessive tape, string or other closure
(3) strange odors
(4) symbolic messages
(5) similarities shared with other bombs if a serial bomber is involved
Limitations:
• The motive will affect the type of bomb and its packaging. A terrorist may not be interested in targeting a particular person.
• The demented or psychotic bomber may leave additional symbolic clues.
• The nationality, training and social background will help determine how informed the bomber is about the customs of the recipients culture.
