HE DID IT AGAIN!
I went upstairs to check on him and when he heard me call for him I heard footsteps running which immediately worried me. I asked what he was doing and he said painting. I bolted upstairs and sure enough the paint can was open again and he had added to his work the night before including fresh spots of paint on my carpet. This time I couldn't get them all out. Luckliy they are small and I'll just have to trim the carpet.
Let me clarify that I did hammer the paint lid shut. When I walked in, I found the screw driver next to the paint can. Luke remembered, from watching me, how to pry the lid open with the screw driver. Smart kid.
Luke had his favorite spiderman slippers that he wears all the time put up high and he got yelled at pretty well while sitting in time out the entire time I cleaned again.
My bedroom door is now locked and will remain that way unless I'm in there and until I finish painting and everything is put away in the garage. . .ERRRRR!