New Jersey officials have arrested a fourth-grade teacher for allegedly sexually assaulting one of his young students and claim the crime was committed inside his own classroom - with a second student present. Paul Yang, 32, who lives in Leonia, was arrested by officers on Wednesday, December 3, following an investigation by the Passaic County Prosecutor's Office's Special Victims Unit. According to a statement from Passaic County Prosecutor Camelia M. Valdes, detectives first received a tip about a possible child assault in Paterson back on October 22. Tipsters claimed that a 9-year-old female student at Paterson Public School No. 25 opened up about an incident of abuse that unfolded inside a classroom - right in the middle of the school day. The investigation led to Yang being charged with single counts of sexual assault and endangering the welfare of a child. If convicted, Yang faces up to 20 years in prison, Valdes explained in a statement on the arrest. It was unclear Monday if Yang was still in police custody but during his initial court appearance on Thursday, December 4, prosecutors requested pretrial detention. Also unclear was whether a judge signed off on that request. Jail records accessed by Us Weekly fail to list Yang among their detainees. Yang had been a fourth-grade teacher for the Paterson School District starting in 2021. He was fired the same day he was arrested. The Bergen Record reports a second child was in the classroom during the alleged sexual assault but kept behind "test blinders" Yang had set up in his classroom. Citing court records, the Bergen Record reported Yang had the other student take their test at the front of the classroom but brought the 9-year-old to the back of the room, where he claimed he had "a treasure box with two lollipops left, a lemon one and a grape one, and referred to them as Korean candy." Gymnastics Coach Arrested on Child Porn Charge, Accused of Sexual Abuse The court filing alleged Yang then removed a piece of silk fabric from his pocket and blindfolded the girl. He then allegedly asked her to guess what flavor lollipop he had. But the blindfold slipped, and the girl could see through the bottom, allegedly seeing the teacher pull his pants down before rubbing the grape lollipop against his genitals, according to the Bergen Record. He then offered the child the lollipop, but she refused, the Record reports from an arrest affidavit. The student "tried to act normal but was nervous," the charging documents claim. Yang allegedly then pardoned both children from the classroom. Another teacher told investigators that one of the children became "inconsolable" when they returned to their regular class, the charges said. Us Weekly was unable to determine if Yang has hired an attorney. Calls to numbers listed for Yang were either disconnected or incorrect. The Paterson Board of Education did not return a call seeking comment on the arrest. Anyone who may have any information pertinent to this case is urged to contact Passaic County Senior Assistant Prosecutor Jessica Petrella at jpetrella@passaiccountynj.org or (973) 247-3330.