Former UFC and Strikeforce fighter Jason “Mayhem” Miller is ending a four-year retirement.

Miller, who last fought in 2012 when he was defeated by C.B. Dollaway, will take on Venator FC middleweight champion Luke Barnatt for the title on May 21 in Milan, Italy. first confirmed the bout.

Venator FC is an Italian-based promotion that will be hosting its third card in May. Matt Hamill is also scheduled to appear.

Miller (28-9) is now 35 years old and has faced an array of legal troubles over the past few years, including a 2015 arrest for allegedly assaulting police officers. He was arrested three years ago on domestic violence charges and later that year on a Contempt of Court charge.

In 2014, the former Ultimate Fighter coach was involved in a five-hour standoff with SWAT team in California.

Over the course of his MMA career, Miller has fought the likes of Michael Bisping, Jake Shields and Ronaldo “Jacare” Souza. He coached opposite Bisping on TUF 14 in 2011.

Barnatt, meanwhile, won the belt in December with a submission of Mattia Schiavolin to improve to 9-3. He was a contestant on TUF before being released by the UFC last year.