According to KSDK.com, an Illinois family has sued the gym owner and trainer for the wrongful death of a 27 year old man who voluntarily entered into a mixed martial arts kickboxing contest.
The family alleges that the man had been injured a few days prior, in practice, and should not have been allowed to fight. They claim that he suffered repeated head trauma during the fight, and aggravated his previous injury.
The gym owner claims never to have seen the man practice at his facility, believing that he trained to fight elsewhere, and had entered the competition as an independent fighter.
MMA "mixed martial arts" is a brutal "sport". I have not seen any participant in televised matches wearing protective head gear. Punches or kicks delivered to the head of fighters all have the potential to be lethal.
All cases of this sort are fact driven. Without more, very compelling facts to demonstrate liability, this suit will not last beyond the first few rounds.