PLEASANTON — A 62-year-old tennis instructor at Castlewood Country Club was charged Wednesday afternoon with sexually abusing at least three young girls during the late 1990s, authorities said.

Henry John Germain of Dublin stood silently behind the glass separating jail inmates from the Pleasanton courtroom as Judge Hugh Walker read the sexual child abuse felony charges that authorities said occurred from 1996 to 2001.

The girls, ages 9 to 12 and his students at the time, are now women in their 20s.

Germain, who did not enter a plea, was arrested Monday by Alameda County Sheriff's deputies at the country club.

According to court documents, two of the women, working with police, secretly recorded a conversation they had with Germain after confronting him on the club's tennis courts.

When one of the women told him how the abuse had affected her life, he told her was sorry for all the things he had done to her.

"Germain made several admissions and apologies for sexually abusing (Jane) Doe #1," the report stated.

"His statements were very incriminating and help confirm Doe #1, Doe #2 and Doe #3 allegations."

The sheriff's office received letters written by the three women, who all took lessons around the same time at the country club, describing the alleged abuse, stating they didn't want it to happen to anyone else.

The accusations ranged from inappropriate touching to pinning one girl in a corner at Germain's home and touching her while playing a pornographic video.

One of the women said she remembered Germain telling her that she was pretty and she deserved the abuse.

At least one victim said the abuse occurred almost daily.

Germain has no criminal record or other complaints against him about his dealing with children.

When he was interviewed by detectives, he said he inappropriately touched children, but denied touching them sexually, according to court documents.

He told detectives he thought the two women were attractive when they were children, but didn't do anything because he knew it was wrong.

Detectives say more victims may be out there. Germain remains on a no-bail status at Santa Rita county jail in Dublin and he is forbidden to have contact with the two victims deputies have talked to so far, as well as anyone under age 18 without appropriate adult supervision.

"It is very possible there will be additional charges," said Deputy District Attorney Ronda Theisen.

Investigators ask possible victims to call the sheriff's office's anonymous tip line at 510-667-3622, Sgt. Raymond Kelly at 510-667-3657 or Detective Rick Gonzales at 510-667-4906.

Reach Sophia Kazmi at skazmi@bayareanewsgroup.com or 925-847-2122.