A missing model is believed to have been encased in a concrete block that was dumped in the Las Vegas desert — after she was first injected with pool cleaner and strangled, according to a report.

Authorities were still using DNA testing to try to confirm that the grisly discovery was Esmeralda Gonzalez, 24, who had been reported missing almost five months ago, according to the Las Vegas Review-Journal.

She was last seen stumbling around in high heels and lingerie and “appeared disoriented” when she tried to get into the wrong house in May, prosecutors wrote in court documents obtained by the paper.

Christopher Prestipino, 45, became the prime suspect after allegedly blabbing to a friend while high on meth about “killing the missing girl,” the documents state.

He was freaked out when she “started acting bizarre and speaking in the devil’s tongue,” the tipster reportedly told cops.

Prestipino tied her to a bedpost, poisoned her and ultimately strangled her, according to the documents, finally using a U-Haul truck to move her concrete-encased body.

The death may have been the result of a “sex fetish game” that took a fatal turn, the report says.

Prestipino and an alleged accomplice — who has not been charged –“panicked” and left the rented U-Haul dolly at the dump site, according to the report. The concrete-encased body was found Oct. 8.

Prestipino later fled to Belize but was arrested when he returned to Vegas on Friday, prosecutors said.

He faces charges of murder, first-degree kidnapping resulting in substantial bodily harm and conspiracy to commit murder and is being held without bail at the Clark County Detention Center, the paper says.

His 31-year-old girlfriend, Lisa Mort, faces a charge of harboring, concealing or aiding a felon, according to the Review-Journal. She had been arrested Aug. 27 in an unrelated case.