Prendergast's wife killed their daughter
Prendergast's wife has a screw loose. She smothered their little girl in her sleep. Prendergast stays with his wife because he knows she's crazy and he's a strong enough character to not hate her for her illness. Following the above WMG, Prendergast's wife gets the professional help she needs.
After her mental illness is successfully treated, Prendergast's wife becomes another Good Counterpart to Foster, in that unlike Foster, Prendergast's wife got the help she needed and became a better person and she also becomes a better mother now that she's fully sane again when Prendergast adopts a daughter from a foster care facility. Dale Gribble is the road worker near the beginning.
Seeing Bill Foster in a field jacket and a gun in his pants, destroying the water main with an M72, is what pushed Dale over the edge and turned him into the conspiracy-crazed gun nut we know. Foster has caught the attention of the Predator and Pendergast and Harrigan possibly know/meet each other on daily basis.
Both movies take place in LA during severe Heat Wave and raging gang wars, which means open season on humans for Predators. D-FENS is actually Teddy Duchamp.
Given that both characters are insane, patriotic, and hot-headed, both look similar in appearance, it is entirely possibly that "Bill Foster" was a paranoia-induced alias. Given that Falling Down takes place in 1993 (with D-FENS being played by 48-year-old Michael Douglas) and Stand by Me takes place in 1959 (With Teddy being about 12), he would be exactly the right age from is previous adventures in Castle Rock. Regarding his ear, we know that plastic surgeons exist, and it could be possibly why he looks concerned when he finds out the mansion is owned by a plastic surgeon.- Depends on whether you consider the original story, The Body, which has Teddy dying in a DUI car crash (he's the driver) in 1972, or the film, which has him as an ex-con doing odd jobs in Maine as an adult, to be canon. Either way, I think this is jossed.
- Another problem with this theory is that Foster is described in the film as being in his late 30s.
If there ever is a sequel, Bill Foster will come back as a Jason Voorhees-like super-zombie.
Similar to how Jason from the Friday the 13th movies used to be human until Friday the 13th Part 6.Leading to a triple crossover between Friday the 13th, Maniac Cop, and Falling Down.