The phrase "assign a police" is not correct in English.
Did you mean "assign a police officer"? If this is the case, you can use it when referring to the act of designating a police officer to a specific task or duty.
Example: "The chief decided to assign a police officer to patrol the neighborhood during the festival."
Alternatives: "designate a police officer" or "allocate a police officer".
Nor would any school be assigned a police officer absent a request from a principal.
Had Madeleine been snatched in Britain, the McCanns would have been assigned a police family liaison officer and the full, slammed-door stonewalling of a police press office.
He has been assigned a police escort "ever since he had begun receiving vague phone and mail threats from self-proclaimed Islamic terrorists".
We'll be briefed about the kinds of calls coming in and then I'll be assigned a police officer for the shift.
The vehicle was parked in a spot that was assigned to a police supervisor, though no one had been assigned to the spot in months, he said.
After his acquittal, Sergeant Bellomo was assigned to a police auto pound while police officials considered whether to try him on administrative charges of misconduct in the Louima case; conviction on such charges could mean dismissal.
Perhaps that is why officials assigned García a police escort for his practice round Monday, though he said he received a similar chaperon nearly every year at the Open.
Court papers from the United States attorney's office said that the arrested police officer — Shawn Jenkins, 41, a 15-year veteran assigned to a police station house in East Harlem — had sought help from a confidential informant who, it turned out, had double-crossed him.
Each dog is assigned to a police officer who has complete responsibility for the animal and who is supplied with a specially equipped car to accommodate the dog.
He was sent to Ramstein in March 2012 and assigned to a police unit that patrolled an Air Force apartment complex outside the base.
