Felo-de-se n. : One who deliberately puts an end to his own existence, or loses his life while engaged in the commission of an unlawful or malicious act; a suicide.

Example:


Taxonomy
Felo, free encyclopedia, burial, felon, committed suicide, search, Unsourced, legal term, early English, English common law, adult, crime, punishable, forfeiture of property, king, stake, heart, crossroad.

Defination from the web:
Felo de se, Latin for "felon of himself," is an archaic legal term meaning suicide. ... incompetent person, however, who killed him- or herself was not considered a felo de se and was not punished post-mortem for his or her actions. ...