Private investigators beware, Homeland Security releases a list of what could be considered suspicious activity.

The following should cause a heightened sense of suspicion:

•Suspicious or unusual interest
•Surveillance (suspicious in nature)
•Inappropriate photographs or videos
•Note-taking
•Drawing of diagrams
•Annotating maps
•Using binoculars or night vision devices

Unusual or suspicious activity does not necessarily mean that terrorist activity is happening, but be aware of the following suspicious behaviors:

•Individuals acting furtively and suspiciously
•Individuals avoiding eye contact
•Individuals departing quickly when seen or approached
•Individuals in places they don’t belong
•A strong odor coming from a building or vehicle
•An overloaded vehicle
•Fluid leaking from a vehicle, other than the engine or gas tank
•Over dressed for the type of weather.


Link:
http://www.ok.gov/reddirtready/REPORT_ACTIVITY/Examples/index.html