SAN ANTONIO -- An eighth-grade teacher at Christian Academy of San Antonio is accused of forming a secret society so that he could get intimate with young girls, an affidavit stated.

Robert Louis Rosseau, 37, is charged with sexual assault of a child, the affidavit stated. He was being held in the Bexar County Jail in lieu of $100,000.

A student who attends another school told police that she was asked by two other girls to join Rosseau's secret society, referred to as the "order" which was based on the occult, magic, freemasonry and Christianity, the affidavit stated.

In order for someone to become a member of the order, the pledge would have to "become intimate" with Rosseau to establish trust, the affidavit stated.

The girl who went to police told investigators that she was being pressured to have sex with Rosseau because he was "receiving pressure from his superiors to have her submit to him," the affidavit stated.

The girl got into a fight with two other girls who tried to recruit her into the "order," the affidavit stated.

School Principal Jim Bazar told KSAT 12 News that Rosseau was placed on administrative leave.

"We take all charges like this seriously. We have to protect our students," he said.

Rosseau, a science and information technology teacher for three years, has had no other complaints against him, Bazar said.