A former amusement park worker convicted of sexually assaulting four young girls was expected to be sentenced in Orange County superior court on Friday.

Bryan William Anast, 46, of Corona, pleaded guilty on Monday to multiple felony charges, including using a minor for sex acts, possession of child pornography and six counts of lewd acts by duress, the Orange County district attorney’s office announced in a news release on Aug. 11.

Anast was arrested at Disneyland, where he worked as a machinist fixing rides, when his first victim came forward and contacted the Orange County Sheriff’s Department in May of 2013.

The victim, who is related to Anast, was 11 years old when she was first sexually assaulted in November 1997, according to the DA’s office.

Detectives discovered that Anast sexually assaulted her on at least four different occasions between 1997 and 2000.

Authorities also found child pornography videos and several images of young girls on a computer data storage device during a search of Anast’s Corona home.

During the ongoing investigation, authorities discovered three more victims Anast has now been convicted of sexually assaulting, the DA’s office stated.

Two of the victims, both 7 years old when they were assaulted, were the daughters of family friends.

The third victim was an 8-year-old relative of Anast that he sexually assaulted on multiple occasions in at his home and at the victim’s Fresno County home, according to the DA’s office.