noun
body of a person who died an unnatural death
Refers specifically to a corpse resulting from an unnatural cause such as accident, suicide, or homicide, as opposed to a natural death.
警察は川で変死体を発見した。
The police discovered a body of a person who died an unnatural death in the river.
遺体 is a more respectful term for a dead body, often used in formal or funeral contexts, whereas 変死体 is a neutral, factual term used in forensic or news contexts.
Compound of 変死 (へんし, 'unnatural death') and 体 (たい, 'body').