"(Gibson) advised that he knew what he did to the victim was wrong because of her mental handicap and her consuming alcohol," Phillips wrote.
Gibson also told troopers that he had sex with other students while working at the school. Troopers spoke to one of the victims who said she had sex with him at his home in 1996, when she was 16 years old.
The woman said he was very nice to her at school - he told her she was beautiful and flirted with her, the complaint said. She initially met him through his nephew, but ended up spending a lot of time at Gibson's house because he had a pool table and provided unlimited alcohol and marijuana.
She said he also had sex in the house with her friend, who was 15 at the time.
Troopers spoke to the friend, as well. She said she went to Gibson's house to party and that he would provide various alcoholic drinks to her and other students. She said he always had porn playing on the television in the home.
She said she had sex with him twice at the home, once with him and her friend. On both occasions she was very intoxicated, she said.
She told troopers that Gibson was very nice to her and that he provided their group with food, ATVs to ride and a place to hang out.
"(Gibson) would ask the students what they would like to drink and he would have it ready for them that weekend to party with," the complaint said. "(The victim) advised at the time she did not see anything wrong with what she was doing at the time but as she got older realized that what (Gibson) did to her was wrong but she was embarrassed to tell anyone."
Gibson told troopers the other girls were not his students but that he often interacted with them at the school. He said the girls came with other students to his home and that he gave them alcohol. He had sex with both girls, he said, though he had sex with the second girl at the request of the first girl, according to the complaint.
He told troopers he knew what he did was illegal.
Gibson has been charged with four counts of second-degree sexual assault, though more charges are pending as troopers still are investigating the child pornography found in his home.
He is being held at Western Regional Jail on $100,000 bond.
Contact writer Ashley B. Craig at ashley.cr...@dailymail.com or 304-348-4850.