A molestation case against an actor and arts teacher in Walnut Creek has taken an unexpected turn.

KTVU has learned some city employees could face criminal charges themselves for failing to report the allegations.

The Contra Costa District Attorney's Office is looking into whether a handful of Walnut Creek city workers broke the law when they failed to report the sexual misconduct going on at their workplace.

The suspect, 27-year-old Jason Pedroza, worked at the Lesher Center in Walnut Creek as an assistant theater teacher.

He faces felony and misdemeanor charges he sexually assaulted two underage girls last year.

Pedroza was a part-time city employee, working as an assistant for the Children's Theater Company

The company is based out of the city's Lesher Center for the Arts.

Pedroza was charged in February.

KTVU learned Friday that Pedroza's co-workers could also face criminal charges for failing to report Pedroza to police.

Ken Nordhoff, Walnut Creek city manager, said because of the investigation he can't go into detail about what the employees do for the city of Walnut Creek.

"We're talking about employees of the city that are being investigated for failure to report," Nordhoff said. "I can tell you there's also a concurrent administrative investigation going on, because we take this matter very seriously. This has been the city's highest priority this week."

It was unclear if the employees worked at the Lesher Center or in the city's administrative offices.

He said the city of Walnut Creek has hired outside legal counsel to conduct an internal investigation.

So far, no employees have been placed on administrative leave, but that could change as the investigation develops.