This has the makings of an interesting idea however there are a couple issues with the logline.
First: I see this a lot in loglines. the logline describes how a character travels to a plot point, instead of just telling us a plot point.
We don't need to know that he stumbles down a road to a nearby trailer park in the logline. how he travels to a plot point is just extra words. (Keep it in the script, just not the logline)
"After being mauled by a rabid dog a truck drivers begs the residents of a nearby trailer park for help."
Second: You haven't told us what the lead character wants or what is standing in his way. I like that we're seeing the story through the eyes of the killer but he still has to have a goal and conflict in reaching his goal.
Anyway, hope this helped, I like the idea, good luck with this!