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  • "All About McGruff the Crime Dog." National Crime Prevention Council.
  • American Humane Association.
  • American Society for the Prevention of Cruelty to Animals.
  • "Animal Cruelty."
  • "Animal Welfare Act as Amended (7 USC, 2131-2156)." The Animal Welfare Information Center. U.S. Department of Agriculture.
  • "Crime Prevention -- McGruff the Crime Dog (1979 - Present)." Ad Council.
  • "First Strike: The Connection Between Animal Cruelty and Human Violence." The Humane Society of the United States. between_animal_cruelty_and_human_violence/
  • "How can I become an animal cruelty investigator?" Oregon Humane Society.
  • "How was the ASPCA started?" Animal Precinct. Animal Planet.
  • "Humane Officer Training Course Information." Wisconsin Department of Agriculture, Trade and Consumer Protection.
  • "Humane Officers." State Humane Association of California.
  • Humane Society of the United States.
  • "Investigations and Rescue." San Diego Humane Society and SPCA.
  • National Animal Control Association. June 30, 2008.
  • Pahl, Michelle. "U.S. 'Animal Detectives' Fight Crime in Forensics Lab." National Geographic. April 2, 2003.
  • Peters, Sharon. "Crime scene team exposes animal cruelty." USA Today. Updated Oct. 9, 2007.
  • Robins, Sandy. "When your pet goes missing, call a detective." MSNBC. Aug. 30, 2006.
  • "State Animal Anti-Cruelty Law Provisions." The Humane Society of the United States. 2007.
  • U.S. Fish and Wildlife Service Forensics Lab. U.S. Department of the Interior.
  • Watts, Robyn. "The Best Job (Humane Law Enforcement)." ASPCA. 2001.
  • "Ways to Help Animals As a Career." Just For Kids. American Humane Association.
  • "What is CITES?" Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES).
  • Wisch, Rebecca F. "Overview of State Cruelty Laws." Animal Legal & Historical Center. Michigan State University College of Law. 2005.