EXCLUSIVE : As AMC’s The Walking Dead: Daryl Dixon is headed to its fourth and final season, the series’ executive producer and showrunner David Zabel is staying in the fold, signing an overall deal with AMC Studios , which produces The Walking Dead franchise. Under the pact, Zabel has sold a gritty cop drama to Netflix , with Scott Free producing. It is currently in development at the streamer. Zabel’s AMC Studios overall deal expands his relationship with the studio where he most recently had a pact built around Daryl Dixon, which he steered for its entire run. “David is a talented writer and seasoned showrunner who we are thrilled to be working with,” said Ben Davis, EVP of original programming for AMC Global Media. “He has been a fantastic partner on The Walking Dead: Daryl Dixon , which has been one of the most ambitious shows in the entire universe.…