I'm on the Xbox, and ages ago Alvor the blacksmith in Riverwood was killed by a dragon(I may have accidentally hit him with an arrow, I'm not actually sure), but his body stayed there for ages. Until I dragged it to the river and set him adrift...had to keep adjusting his trajectory as he kept washing up on the shore..eventually once he went over the waterfall I left him....he could be sailing around the waters of Skyrim as we speak, or alternatively, he could be lodged in a crevice. Anyway, do you just leave them, use a console command(if PC) to get rid, or are you a creative disposer of cadavers?