The family of the victim in this case filed a wrongful death lawsuit on behalf of the dead man.
Not all wrongful death cases are the result of negligence on the part of the named defendant. This case may well be one of those. Evidently, the man who died was out night-clubbing with his friends at a well-known downtown entertainment venue. It was popular with folks, as it was on a boat; a yacht, in fact. The club was named after the owner in an artful play on words involving his last name, which was Knight.
Apparently, the man had been at the club for some time, socializing with friends, when he decided it was time to leave. As he was attempting to disembark to the dock, he plunged into the water instead. Despite that fact that his friends jumped in after him, and pulled him out, he was unconscious, and subsequently died.