and detective groups exist within many law enforcement organizations
either for dealing with particular types of crime, such as traffic law
enforcement and crash investigation, homicide, or fraud; or for
situations requiring specialized skills, such as underwater search,
aviation, explosive device disposal ("bomb squad"), and computer crime.
Most larger jurisdictions
also employ specially-selected and trained quasi-military units armed
with military-grade weapons for the purposes of dealing with
particularly violent situations beyond the capability of a patrol
officer response, including high-risk warrant service and barricaded
suspects. In the United States these units go by a variety of names, but
are commonly known as SWAT (Special Weapons And Tactics) teams.