This can be argued since the introduction of the F.B.I. The F.B.I. was introduced around (1908) to deal with national crime as a national police force (per se), the problem is that the U.S. Marshals existed by Congressional action in 1789 and has served in that position for far longer and with the same goals (a lot of argument still exists over these issues).
Depending on which side of this debate your on, then: John Clark, director of the United States Marshal's service or Robert S. Mueller, III, director of the F.B.I.
The County Sheriff
the sherif
Any law enforcement officer with an arrest warrant. The chief law enforcement officer for the county is the county prosecuting attorney (DA)
The Sheriff
In most counties the Sheriff or District Attorney is the chief law enforcement officer for the county. In most states the State Attorney General is the chief law enforcement officer for the state.
In the United States, each county elects a "Sheriff". The Sheriff is the chief law enforcement officer of the county, and is also responsible for the carrying out of court orders and county tax codes. The Sheriff delegates his (or her) power to the "Sheriff's Office" (which is similar to a police department).
The chief law enforcement officer of California is the state attorney general, currently Kamala Harris.
No. Police officer is not a proper noun
the sherif
District Attorney
L.E.O. - stands for Law Enforcement Officer.
One drink equals__________ in the eyes of law enforcement.