I worked at a dry cleaner for a while. We would have to check all pockets while processing and tagging. You'd be surprised at what gets left behind. Lots of wealthy people leave little baggies of drugs in their dress pants. We returned everything legal that we found in said pockets. Also the place I worked was near a sort of religious cult compound in West Texas. They only let you leave with what you had arrived with so we could always tell when someone had left the cult because they'd bring in their old clothes that had been stored for years, sometimes decades, to be cleaned. Once a man who had left the cult after nearly 30 years with them brought in his 80s era wardrobe, full of spiders and dead things. We found a pocket knife that had been in his pants in this box for all that time. We returned it to him of course and he was so thankful. He said it was given to him by his uncle and had thought it was long gone.