J.P.
buy or borrow a small Havahart animal trap - bait it and put near where the red squirrel enters his nut stash. When you have trapped him - drive to some woods on the other side of your town and let hem go. Come back and re-set the trap - there may be other red squirrels helping him - they ususally live in small colonies and try to invade the area of a large colony of grey squirrels. We had a group of red squirrels getting into our garage attic and then under the eves of one of our bedrooms - it took several months - but we re-located all of them. One has been back in out yard this year - but the greys give him a lot of grief! Good luck ! Keep working at it. They can destroy your property if you let them!