Croaked units leave bodies, which exist as physical objects for a short time after croaking. Bodies disappear at the start of the next turn that their side has, unless moved/claimed (e.g. uncroaked, reanimated as golems, eaten, used for something else like the teddybearskin rug and mounted gwiffon head in Parson's room)Erf-b1-p035. In the event that their side is eliminated, unclaimed bodies disappear at the next nightfall.
As of erf 161Erf-b1-p161, speculation exists as to whether burying a corpse counts as moving it, and whether a body thus moved remains to be uncroaked or decrypted.