Police in San Antonio say they've arrested a Christian school teacher for sexually assaulting two teen girls.

They say the San Antonio teacher was trying to form a secret society of teenage girls to have sex with.

Yami Virgin has more on this disturbing story.

"We are very shocked."

For the principal of Christian Academy of San Antonio, the allegations against one of his teachers for sexual assault of a child, are hard to believe.

"William Robert Rosseau has been arrested for sexual assault of a child. it's believed he's been having sexual relations with our victim for the past eight to nine months and the investigation is still ongoing."

"We have nothing to hide with this. We want our parents to know their children are safe and that we're doing everything we can to ensure their safety."

According to an affidavit, Rosseau created a secret society called "The Order".

A relative and a friend of hers both became members by having sex with Rosseau.

They called him "The Director" or their "Prince."

The secret was discovered when the two girls brought another girl to Rosseau's home so he could initiate her. The girl refused.

When she tried to get help from friends to reveal what was going, that's when police were brought in.

"The teacher in question was placed on administrative leave at that time."

We're told that the teacher taught science, keyboarding and bible here at the school.

The school tells us none of the incidents took place there.

"I am surprised."

Today, a letter went home with the students.

"I don't think that whatever this teacher has done should reflect on this
school."

At Rosseau's home, neighbors are worried about his family. Especially his three young children.

"Those little children are the only ones we had any contact with. And they played here in the street. We want to respect their privacy and give them as much support as we can."

While one of the girls who had sexual contact with Rousseau admitted to the allegations, the one that is a relative of the family is still denying that anything happened.