The Alabama sheriff who threw his support behind accused jailbait-chaser Roy Moore’s failed Senate bid is now under investigation for allegedly having sex with an underage girl.

Mary Elizabeth Cross, 41, says Etowah County Sheriff Todd Entrekin threw drug-fueled parties with underage girls and had sex with her four times in 1992 when he was 29 and she was just 15 years old — below Alabama’s age of consent, which is 16.

“I was 15. It was right before my 16th birthday, and I remember telling everyone I couldn’t wait to turn 16 so I could drive,” she told AL.com. “We ended up at the lake house that night, and that’s where I had sex with Entrekin.”

The “lake house” was a camper parked on some waterfront land Entrekin owns on Charada Lake Road in Rainbow City where he reportedly threw wild parties with other cops and young girls, the outlet reported.

Entrekin rarely did drugs, but he plied Cross and others with them while she had sex with him and fellow officers, she said.

“It was drugs, you know what I’m saying? It was free drugs for us. We never had to pay for drugs, so for us sex just became a payment for it,” she said.

“So by this time I’m now almost 16 years old, and I would go to the Gadsden Mall, and my momma would be thinking that I was going to the Gadsden Mall or to the public library, but [Entrekin] would come get me,” she said.

The Gadsden Mall is where Roy Moore — then in his 30s and a prosecutor with the Etowah County District Attorney — allegedly cruised for underage girls in the 1970s.

Nine women have accused Moore of pursuing them while underage, including three who said he sexually assaulted them. He has not been charged with any crime.

Entrekin backed Moore when he ran for US Senate last year and never pulled his support after allegations against Moore erupted.

“I did not have prior knowledge of these allegations. I will always stand by the victim of any crime and wish the alleged wrongdoing had been reported at the time it allegedly occurred. My thoughts and prayers go out to those affected. If these allegations are proven truth, I will withdraw my endorsement,” Entrekin said at the time, according to a WBRC-TV.

Accusations against Entrekin come a scant three months after he was caught using $750,000 in funds meant to feed county inmates to instead purchase a beach house — a move that was ultimately deemed legal but widely lambasted.

The Oneonta Police Department is investigating allegations against Entrekin, according to AL.com.