Chance medley

Chance medley (from the Anglo-French chance-medlee, a mixed chance) is a term from English law used to describe a homicide arising from a sudden quarrel or fight. In other words, the term describes "the casual killing of a man, not altogether without the killer's fault, though without an evil intent; homicide by misadventure". The term distinguishes a killing that lacks malice aforethought necessary for murder, on the one hand, and pure accident on the other.

 This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "". Encyclopædia Britannica. 5 (11th ed.). Cambridge University Press. p. 835. 

...
Wikipedia