Virginia Attorney General Jason Miyares said Tuesday he wants to take over a repeat sex offender’s case after the AG accused Fairfax County’s top prosecutor of not trying to convict the self-proclaimed transgender woman for allegedly exposing himself to several girls and women.

Mr. Miyares, a Republican, sent the thorny letter to Commonwealth’s Attorney Steve Descano, a Democrat who received campaign cash from billionaire George Soros, after the prosecutor either dismissed or did not investigate potential charges against 58-year-old Richard Kenneth Cox.

Cox — who has done multiple stints in prison for sex-related crimes dating back to the 1990s — was charged in Fairfax in June after Mr. Miyares said he flashed women inside a Planet Fitness locker room. Prosecutors dropped the case a month later.

In November, police said Cox twice visited a county recreation center in Oakton and used the women’s locker room after claiming to be transgender.

The facility later issued him a no-trespass order after learning he was a sex offender, but Mr. Miyares said prosecutors never looked into charging Cox for the violation.

“Once again, you have failed your constituents in Fairfax by insisting on acting like a social worker instead of a prosecutor,” Mr. Miyares wrote. “Once again, innocent Virginians are being harmed by your inaction and the ’criminal first, victim last’ mindset that has beset the Fairfax Commonwealth’s Attorney’s Office under your leadership.

“Fairfax residents deserve better, and Virginians cannot afford another botched case putting their safety at risk,” the letter reads, which urged Mr. Descano to hand over the case to the AG’s office.

Cox is currently behind bars in Arlington County after police arrested him in December for allegedly exposing himself inside a women’s locker room at a rec center, according to WJLA-TV.

Jail records show Cox is facing nearly two dozen sex-related charges following an Arlington County police investigation that linked him to other exposure incidents.

Police accused him of exposing himself to a woman and two girls in the same rec center’s locker room a week before his arrest. Authorities also tied him to multiple exposure incidents inside the women’s locker room at Wakefield High School’s community pool.

“We again ask if anybody has any information or was a victim of anything, we ask that they come forward,” Arlington County Police Chief Andy Penn told WJLA. “We are trying to make sure we nail down everything that occurred, that we present a thorough case for prosecution.”

Cox’s criminal history extends back decades, according to court records.

In 1992, he exposed and fondled himself in front of multiple children inside an Arlington County gym. He served nearly eight years behind bars for the offense.

Cox wrote to a judge in 1995 to say “I am aware that I suffer compulsions to expose myself in public places.”

He is due back in Arlington County court on March 3.

• Matt Delaney can be reached at mdelaney@washingtontimes.com.