Who is Detective Jimmy Doyle in the motion picture, The French Connection?

Detective Jimmy "Popeye" Doyle is the premier detective on the New York narcotics team. Doyle works with his partner Cloudy for the Narcotics Bureau. Doyle is considered a tough cop who will do whatever it takes to make a bust; he regularly busts several bars so that he can get information from their owners about other potential leads.

When Doyle gets wind of the large heroin deal going down, he gets on the case immediately. Even when his supervisors are not convinced that he can find the culprits, Doyle keeps on chasing them and following clues. Eventually, Doyle finds the guilty parties and the drugs, bringing most of the bad guys to justice.