Maceration is a bone preparation technique whereby a clean skeleton is obtained from a vertebrate carcass by leaving it to decompose inside a closed container at near-constant temperature.
[1] This may be done as part of a forensic investigation, as a recovered body is too badly decomposed for a meaningful autopsy, but with enough flesh or skin remaining as to obscure macroscopically visible evidence, such as cut-marks.
Maceration is a form of controlled putrefaction, a stage of decomposition in which the proteins of the body's cells are broken down and consumed by bacteria in anaerobic conditions.
In this process, extra care is taken when removing the eyeballs, ears and jugular muscles, because some bones are shallow and brittle, such as the thickened external acoustic opening of many mammals.
If a crime has been established, an examination of the bones without overlying soft tissue may provide evidence on what weapon (if any) was used or on the nature of the injuries sustained.