As opposed to what is portrayed on TV and in the movies - very rarely.
To stop the criminals from escaping and to get rid of bad people.
It is sometimes necessary to protect the lives of civilian by-standers or themselves
absolutely not
shoot it or call the police
It is never legal to shoot anyone inless you are part of a government organisation such as the police or army and have orders to shoot
call the police, shoot them, get out, or do what they say.
Varies from state to state.
shoot him
you cant.
The police shoot him after he shows a gun in their face
Cult of Dooshakism Investigative Report and Police Shoot Out - 2011 was released on: USA: 14 December 2011 (internet)
well the police shoot him when he was in the vacunt lot