Complex sentence: After the two officers defeat the head of the Neighbourhood Watch Alliance and his members, who have been causing problems in the town, the pair are celebrating their success at the police station, and the movie appears to be wrapping up.
Split into simpler sentences: After the two officers defeat the head of the Neighbourhood Watch Alliance, who has been causing problems in the town. The pair are celebrating their success at the police station, and the movie appears to be wrapping up.