SPOKANE, Wash.—Police issued arrest warrants Dec. 12 for four men accused of trying to extort money from a former state legislator who resigned his post after an affair with one of the accused became public.

Spokane County prosecutors contend in court documents that Cody Castagna and three others attempted to blackmail former Wash. state Rep. Richard Curtis in October. Castagna turned himself in to authorities late Dec. 12.

Curtis, a Republican, told a newspaper in his southwest Washington district shortly after the story broke that sex was not involved in what he said was an extortion attempt. He also declared he was not gay.

But in police reports, Curtis said he was being extorted by Castagna, who he had sex with at a hotel room in Spokane, where Curtis was attending a GOP retreat. Castagna has denied wrongdoing and contended Curtis reneged on a promise to pay $1,000 for sex.

Castagna is charged with three counts of second-degree theft of a credit card, one count of second-degree extortion and one count of conspiracy to commit second-degree extortion.

The other three men—Castagna’s brother Joseph L. Castagna, Robert H. Fletcher and Brandon D. Burchell—have been charged with second-degree extortion and conspiracy to commit second-degree extortion.