The family of kickboxer Dennis Munson Jr., who died following a fight promoted by Roufusport, has filed a lawsuit against the well-known mixed martial arts gym and others involved.

Munson Jr. died in 2014 due to complications from head trauma following a kickboxing match. Munson trained at Roufusport and the card was run by gym management. Munson Jr.’s estate and parents are named as plaintiffs in the wrongful death lawsuit, which was filed Tuesday in Milwaukee County Circuit Court, per online court records.

The news of the lawsuit was first reported by the Milwaukee Journal Sentinel. Per the paper, the lawsuit contends that the defendants showed negligence, maliciousness and “deliberate indifference.”

Munson was 24 years old at the time of his death. It was his first fight.

Duke Roufus, one of the most high-profile coaches in MMA, is named as a defendant in the lawsuit, as is Scott Joffe, who co-promoted the event March 28, 2014 at Milwaukee’s Eagles Club. Also named as defendants are ringside doctor Carlos Feliciano; referee Al Wichgers; coaches Scott Cushman and Joe Nicols; and Roufusport Academy. Two insurance companies and the Injured Patients and Families Compensation Fund were named, as well.

At the time of the card, the Wisconsin Department of Safety and Professional Services regulated MMA and boxing in the state, but not kickboxing. That has since changed. A law, signed by Gov. Scott Walker, for the state to regulate and sanction kickboxing went into effect March 1.

The legislation was spurred on by an investigative series written by the Journal Sentinel’s John Diedrich three years ago. The newspaper interviewed a dozen independent combat sports experts, who reviewed the fight video and determined Munson to exhibit obvious red flags, including crossing his feet, not defending punches and staggering during the bout.

Video of the fight showed Feliciano looking at his cellphone during significant parts of the sequence of events and Cushman lightly slapping Munson in the corner following the three-round bout, just before Munson collapsed.

The Journal Sentinel reported that Munson had struggled to cut eight pounds for the 135-pound bout and the weigh-ins were conducted earlier on the same day of the fight. No protective headgear was required by the Roufusport-promoted North American Fighting Championship.

An e-mail sent to Joffe for comment by MMA Fighting was not returned Tuesday.