Who unscrewed the nuts from the tires?

I bet the tea lady did it!

Bad writing. This remake was stupid.

Maybe the Sheriff

Maybe the little kid. I know he tried to help at the end but he could possibly have been taught/forced to comply with the killers.

I don't think anyone did. Maybe their van was just raggedy. It surely looked like it.

I always figured the kid did it

The sheriff, the kid, etc