Warning: Spoilers for The Walking Dead: Dead City season 1, episode 3The Walking Dead: Dead City's third episode explains not only where new villain The Croat (Željko Ivanek) gets his fuel, but how he turns zombies into drugs too. It was clear from Dead City's poster – which features Maggie (Lauren Cohan) and Negan (Jeffrey Dean Morgan) against the decapitated, zombified head of the Statue of Liberty – that the Walking Dead spinoff series would be riffing on John Carpenter's Escape from New York. Dead City episode 3 "People Are a Resource" makes those links stronger than ever, right down to warlord The Croat entertaining his people with violent gladiator matches staged in Madison Square Garden.

https://screenrant.com/walking-dead-city-croat-dead-bodies-fuel/