A British father has been found guilty of 36 counts of rape after DNA testing proved that he had fathered six children with his own daughter.

The man's identity has not been revealed, as it would inadvertently identify his daughter, the victim. According to reports, the rapes took place over a span of 20 years and it is alleged that he raped at least one other of his children as well.

He reportedly pretended that a fake mystic told him to have sex with them and manipulated his children with the "witchcraft."

"These sickening acts of abuse were carried out by a person that was supposed to protect and care for the victims, but instead, he systematically controlled their lives, grooming them for his sexual gratification," prosecutor Hayley Fackrell told the court.

The man denied the 36 charges of rape and one charge of sexual assault but was found guilty on all counts after just four hours deliberation, according to WalesOnline.

He will be sentenced next Friday. "You will not be surprised to hear a very long prison sentence awaits you," the judge told him.