Anyone know this horror movie?

I saw a horror movie a couple years back.cont remember the title or year,but i know ive been wanting to see it again. It started off w/ these 2 girls going to a small town and not being able to find anyone.there where eventually 2 other people that met up w/them a cop(who had shot a kid and never got over it) and somebody else.the monster in the town would make noise of people or animals to lure them out. and the monster ended up being killed w/some sort of chemical a special group of army people brought.