Ex-basketball coach charged with having sex with O.C. student

Authorities in Orange County Thursday night were looking for possible additional victims of a former high school coach charged with having a sexual relationship with a student that started when she was 14.

John Tran Nguyen, 21, is charged with having sex with the girl while she was a student at Los Amigos High School in Fountain Valley and while he was a contract assistant basketball coach there, the Orange County district attorney's office said.

The alleged sexual relationship began in December 2011 and continued during the next year, the district attorney's office said in a statement.

Nguyen is charged with slapping the girl during an argument in his car in January. She reported the incident to school officials, who alerted Fountain Valley police.

During an investigation, police learned about the alleged sexual relationship, according to the district attorney's office.

Nguyen is charged with a felony count of unlawful sexual intercourse and a misdemeanor count of domestic violence battery. He is free on $20,000 bail and is scheduled to be arraigned Feb. 23.

Anyone with information is asked to call Det. Jesse Hughes at (714) 593-4480 or district attorney investigator Lou Gutierrez at (714) 347-8794.