Prosecutors have dropped charges against former UFC champion Conor McGregor after he allegedly smashed a fan’s phone outside a Miami hotel.

Prosecutors in Miami said on Monday the victim has stopped cooperating with investigators and has recanted his story. The Miami Herald reports the fan, Ahmed Abdirzak, dropped his civil lawsuit with McGregor after reaching a settlement. Abdirzak had been seeking $15,000 in damages.

Florida assistant state attorney Khalil Madani said that Abdirzak “has credibility issues as he’s changed his previously sworn testimony.” He added, in a written summary that: “Based on the witness’s credibility issues, his unwillingness to respond to a subpoena and the inability of the witnesses to testify as to his subjective mindset, the State of Florida cannot prove the charges against Mr McGregor beyond a reasonable doubt.”

McGregor was arrested in March over the incident. According to a lawsuit, Abdirzak and other fans were taking video of McGregor outside a hotel when the fighter allegedly punched the phone out of Abdirzak’s hand, repeatedly stamped on it and walked off with it in his pocket.

McGregor appeared to announce his retirement from mixed martial arts a few weeks after his arrest. McGregor, the former UFC featherweight and lightweight champion, tweeted: “Hey guys quick announcement, I’ve decided to retire from the sport formally known as ‘Mixed Martial Art’ today.

“I wish all my old colleagues well going forward in competition. I now join my former partners on this venture, already in retirement. Proper Pina Coladas on me fellas!”

The Irishman, who finishes with a 21-4 record, has not fought since October last year when he lost to lightweight champion Khabib Nurmagomedov at UFC 229. McGregor was suspended for six months after that fight ended with brawls spreading into the crowd.