A police officer or cop was an individual who worked for a law enforcement agency and was responsible for upholding the local laws. Police officers also investigated alleged violations of laws, arrest and interrogated suspects and protected local citizens.
In 2004, police officers of the Detroit Police Department arrested Loomis after being tipped off by Jonathan Archer and T'Pol of his involvement in a series of local kidnappings. (ENT: "Carpenter Street")
Dan Bell was a fictional police officer portrayed in the The Big Good-Bye of the Dixon Hill series. In 2364, Jean-Luc Picard underwent an interrogation while playing Dixon Hill during a holonovel. (TNG: "The Big Goodbye")