The traditional role of a police dog is one used to enforce public order by tracking, chasing and holding suspects either by direct apprehension or a method known as "Bark and Hold." Detection dogs or explosive-sniffing dogs are used to detect illicit substances such as drugs, explosives or incendiary devices which may be carried on a person in their effects or may be located at a crime scene. Law Enforcement/Arson dogs are true partners to their handlers and are considered law enforcement officers in their communities.