Promoter Frank Warren has called for people to lose their licenses after a sparring session saw former boxer Nick Blackwell hospitalized.
Blackwell had no license to fight for the November 22 incident that left him needing surgery to reduce swelling on his brain.
"How stupid is it for him to be sparring in a ring after such a serious injury that ended his career?" Warren told the BBC.
"Anyone involved should have their licences taken away, because they certainly didn't have Nick Blackwell's or boxing's best interests at heart."
Blackwell retired in April after a loss to Chris Eubank Jr, which saw him placed in an induced coma.
"What concerns me is are any licence holders involved? Who was he sparring with? Is he a professional boxer?" Warren said.
"How on earth can people have allowed this to happen?"
The British Boxing Board of Control is investigating the incident.
Blackwell obtained a trainer's licence in October and was to be in Liam Williams' corner for the Warren-promoted boxer's light-middleweight win over Gabor Gorbics in Cardiff on Saturday.
— Frank Warren (@frankwarren_tv) November 27, 2016
Warren said that the injury incident was not about money, but because someone wanted a fight.
"A lot of money was raised to help, because he wasn't going to box anymore and he obviously received his purse from his last fight, so this is not about money, this is about someone wanting to fight."
"It's not like this is a few years on — it's eight months ago. This is madness, total madness."
Reports said that Blackwell, 26, was in a stable condition after his surgery.