Hagerstown City Police first brought charges of parental child abuse, second-degree offense and second-degree assault against the father Aug. 27 in connection with the youngest son.
The son told police he was about 5 years old when his father forced him to perform oral sex with him. The boy also told police his father made him snort a white powder up his nose before the sexual encounters.
The powder made him feel drowsy and listless, the boy told police.
Those encounters, which always occurred when his mother and other siblings were out of the house, went on for two years, the boy told police.
In the case of the younger daughter, she told police in August her father began assaulting her when she was 6 or 7 years old. She said he would try to have intercourse with her but was unable.
She also said there were incidents where she was forced to perform oral sex on her father, police reports said.
She told police she didn't know until the interview with police that her siblings had also been abused.
On Sept. 4, the eldest daughter, now 22, told police her father began molesting her when she was 10. She said he forced her to have sexual intercourse with him several times a week for more than two years, police reports said.
He told her never to tell, police reports said. And until her interview earlier this month, she told police she never did.
Though no charges have been filed as yet, police documents also detail allegations of sexual abuse against still another son who told police he was forced to perform oral sex on an uncle when he was 10.
That son, now 19, told police he would be paid $50 each time - money he would give to his father.
When the mother was told of those incidents, the boy told police, she allegedly told him not to say anything because "it was family.''