wrongful-death lawsuit

wrong・ful　━━ a. 悪い; 不正［法］な.
Wikipedia article "Wrongful death claim'

WRONGFUL DEATH

n.

A death that is caused by the wrongful act or negligence of another and that serves as the basis for a civil action for damages on behalf of the decedent's heirs.

Parents sue People to People over son’s death in Japan
Kansas City Star - MO,USA
AP MINNEAPOLIS | The family of a Minnesota student who died in Japan filed a wrongful-death lawsuit Monday against the People to People exchange program and ...