Paul Winfield was also the cop in "Terminator", right?
Yes that is correct.
No, Paul Winfield was the captain of the USS Reliant in Star Trek 2:The Wrath of Khan.
Paul Winfield "did" play the cop in the first Terminator movie. He was in the police station when Arnold shot the place up.
Paul Winfield did play a cop in the first "Terminator" movie.