Lytton's policemen

Gustave Lytton sometimes allied with extraterrestrials disguised as human policemen while on Earth.

At one point, these policemen were a group of 2 Dalek Troopers, including Lytton himself, who were dressed in police garb to blend in with the urban environment the Daleks were fighting in. They were equipped with futuristic weapons that fired lasers. (TV: Resurrection of the Daleks)

Lytton also had fake policemen with him when he met the Sixth Doctor. (TV: Attack of the Cybermen)

A version of Lytton from another universe also used inhuman policemen as allies. (COMIC: Crime Like Politics is Always Personal, Even the Oppressed Own Their Lives..., Goodbye to All That)