Two Department of Justice guides about combat veterans returning to their former police careers.

These two guides may be useful resource tools, for private investigators.

Alexandria, VA – Combat veterans face many issues when they are deployed overseas to combat duty and then return to either new or previously held positions as federal, state, local, and tribal law enforcement officers. The International Association of Chiefs of Police (IACP) and law enforcement leaders across the United States recognize the need for innovative reorientation policies, procedures, and training strategies to address the highly complex transitional process these veterans face upon return.

The U. S. Department of Justice pdf.
"Employing Returning Combat Veteran's As Law Enforcement Officers."

Link:
http://www.ojp.usdoj.gov/BJA/pdf/IACPEmployingReturningVets.pdf

The U. S. Department of Justice pdf.
"Combat Veteran's And Law Enforcement."

Link:
http://www.wascop.com/VetsGuide_300dpi%5B1%5D.pdf