Swamp Zombies (2005)

An evil M.D. (Shannon Solo) at a large metro hospital has come up with a seriously spooky serum: it purports to de-corpse bodies of the just-dead sort. When the feds get it into their heads to inspect Shannon's racket, he has to get rid of the evidence right away, so he dumps the stiffs in the Pennsylvania swamplands. From there on out there's nothing for them to do but come back to life and become Swamp Zombies (2005), terrorizing the students who are conducting experiments in and around the muggy lowlands. With the help of a park ranger (writer-director-producer Len Kabasinski, credited as Leon South), the police captain (Dan Severn), a hermit (Brian Heffron), and a blonde-beaut bystander (Pamela Sutch), the students get busy trying to figure out how to get these busybodies down in the ground where they belong.