I wrecked my truck into a ditch last summer, there was alot of damage to the front end and on the drivers side door. and ever since then when ever it rains or i go into a puddle the floor stars to get very wet, I'm worried about rust and mildew from the water. I've taken it to numerous garages to find the problem and no one can seem to locate the spot where the waters getting in, they checked the fire wall it's fine. im almost positive its coming up from the bottom. if any one has any ideas or has had this problem could you pleassseeee help me out?

 

I'd start by pulling up my carpet and looking for cracks or gaps. Have someone blow some compressed air under the truck, up towards the floor panels while someone is inside with the door shut. If there's a gap or crack you should feel the air blowing through.

 

I would find out if the shop you had fix the dammage guarantees their work and leave it with them till problem fixed.