Mina was arrested in May on child sex charges. He was booked into the Orange County Jail on charges of sexual battery on a child under 12, and lewd or lascivious molestation of a child under 12, jail records said.
Investigators were notified of the allegations Tuesday by a school resource officer, according to an arrest report.
The girl told investigators at age 10 she was molested every day for three years by Edward Mina. She said he began kissing her and he was "teaching me how to kiss."
The girl said the kissing later turned into molesting, investigators said.
The girl told investigators that he would discuss his sex life with her and show her pornography, deputies said.
The girl said that Edward Mina would tell her, "Never tell anyone what I do to you. It's our little secret," deputies said.
The girl agreed to have a recorded phone conversation with Edward Mina and told him she told a friend about the molestation. He said to her, "If you tell them the truth, I'm going to go to jail for a long time," deputies said.
The girl said said the abuse stopped when she was 13 years old.
“These are extremely serious and disturbing criminal allegations,” John Mina said at the time of his brother’s arrest. “At this time, I am most concerned with the welfare and privacy of the child involved, and won’t be making any further comment.”