Connecticut- The missing 15-year-old girl discovered by police stashed in a cramped, secret room had been having a sexual relationship with the demented owner of the house of horrors before she vanished, according to a published report.

Danielle Erica Cramer had been working for Adam Gault, 41, a West Hartford dog trainer, before she disappeared nearly a year ago, the Hartford Courant reported.

And two weeks before the girl disappeared, Gault filed a sexual-abuse complaint with the Bloomfield police department against a friend of Cramer’s brother’s to persuade state officials to remove her from her family’s house, the paper said.

The startling revelation about Cramer’s alleged relationship with Gault was penned in the girl’s own hand in a diary given to police investigators by her distraught mother. In addition, the girl wrote that Gault had introduced her to drugs and booze. Gault also rented a commercial loft space where police found a mattress and video and camera equipment, the newspaper said.

As new details of the rescued teenager’s yearlong life in captivity emerged, police said they were probing whether Gault had abused three other young girls.

Police said that during her captivity, Cramer had assumed a new name.

Gault, a co-worker of the girl’s stepfather, had been questioned several times by cops but he denied involvement in her disappearance.

Gault was being held on a $1 million bond.

His live-in girlfriend, Ann Murphy, 41, was remanded on $750,000 bond and a roommate, Kimberly Cray, 26, on $500,00 bond.

Additional: WEST HARTFORD, Conn. – The dog trainer accused of illegally detaining a troubled teen for a year had a stash of homemade pornography videos in his house, it was reported yesterday.

Adam Gault, 41, had a collection of grainy videos – some of which were posted on the Internet – that featured various young girls who have yet to be identified, sources told The Hartford Courant.

The videos were taken at Gault’s home, sources said.

Gault has been held on $1 million bond since Wednesday, when cops found Danielle Cramer, 15, locked in a secret room under a staircase.

Gault’s common-law wife Ann Murphy and a friend, Kimberly Cray, are also in custody.

Cramer has told investigators that she participated in Internet sex shows and modeled for Gault, the paper reported.

Cray’s lawyer Michael Georgetti has said the trio was protecting Cramer from her abusive parents.