Drug Enforcement Administration
Federal Bureau of Investigation
Harris County Texas Department of Homeland Security
Harris County Texas Sheriff's Department
Houston Livestock Show and Rodeo
Houston Texas Transtar (Traffic and Weather)
Houston Texas Police Department
NASA/Johnson Space Center
NASA/Space Shuttle Information
National Center for Missing and Exploited Children
Texas DPS - Private Security Board
Texas Commission on Law Enforcement Officers Standards and Education (TCLEOSE)
National Archives and Records Administration
Air Security
Texas Association of First Responders
Harris County Constable Pct. 4
Lang Investigations, Inc.
P.O. Box 631727
Houston, Texas 77263-1727
Tel: (713) 789-1449
Fax: (713) 789-1367
Fax: (800) 789-3181
dlangjr@langinvestigations.com