Former LIBERACE toyboy SCOTT THORSON tells ALL in a bombshell exclusive ENQUIRER interview .

 LIBERACE took a terrible secret to his grave when he died from AIDS in 1987.

His former lover Scott Thorson claims the flam­boyant entertainer was directly responsible for the deaths of AT LEAST three men after knowingly infecting them with HIV, the AIDS virus.

Thorson began a six-year romance with Liberace in 1976 when he was a teen and says the showman routinely engaged in unprotected sex with young men at wild, cocaine-fueled parties at his home – even after he suspected he was ill.

“Liberace was a sex addict,” Thorson told The ENQUIRER from inside the Washoe County Jail in Reno, Nev., where he was awaiting sentencing on credit card burglary charges.

“He never used a condom nor prac­ticed safe sex. His lovers Cary James, Chris Adler and Bob Fisher all died because of him – and there could be several others.”

Although it wasn’t confirmed that Liberace had AIDS until after his death, Thorson is convinced the performer knew he was carrying the killer virus for years.

Thorson co-authored “Behind the Candelabra,” the book that the hit HBO movie was based on, which stars Michael Douglas as Liberace and Matt Damon as Thorson. The May 26 premiere drew 2.4 million viewers – but they didn’t get to see any information about the AIDS scandal because it wasn’t touched upon in the film.

In a bombshell revelation, Thor­son says he realized something was wrong after Liberace acted suspiciously during a 1985 visit to AIDS-stricken actor Rock Hudson.

“Liberace asked Rock a lot of ques­tions about having and living with AIDS,” Thorson recalled. “Like, what sort of pain was he experiencing? What sort of medicine was he tak­ing? How did he feel?”

Thorson didn’t think anything of it at the time, but he later came to believe that Liberace had either al­ready been diagnosed or, at the very least, suspected he was infected by then.

Cary James, who was Liberace’s chauffeur and last live-in lover, died of AIDS in March 1995. Cary once claimed that after he and Liberace tested positive for HIV, they “made a pact never to tell another soul about our AIDS.”

Christopher Adler, son of Broadway composer Rich­ard Adler, died from AIDS in November 1984 at the age of 29. The third man Thorson claims was infected by Lib­erace, Bob Fisher, was one of many young men he men­tored through the years.

“Liberace’s dead today because of his lifestyle, his sexual addiction, and he had this weakness for young men,” declared Thorson, 54. “I know because I was one of them. I was very lucky that I didn’t contract the AIDS virus.”

As The ENQUIRER previously re­ported, Thorson – who has advanced anal cancer – was arrested in Febru­ary at a Reno hotel after using credit cards that didn’t belong to him. After giving The ENQUIRER this shocking interview, he was bailed out of jail by Dennis Hof, the owner of Nevada’s famous Bunny Ranch brothel. He is expected to be sen­tenced in July.

On the night he was released, Thorson finally sat down to watch “Behind the Candelabra.” He wasn’t disappointed, calling Matt Damon’s portrayal of him “very fair.”

Thorson added: “I’d love to meet Matt and thank him.”