OAKLAND — A criminal investigation of an Oakland police officer involved in a sexual misconduct scandal with a dispatcher’s daughter has ended in no charges being filed against him.

However, Officer Terryl Smith and at least one other officer lost their jobs because they lied to internal affairs during the investigation, according to multiple sources.

“The criminal investigation involving a former Oakland police officer is closed,” Oakland police spokeswoman Johnna Watson said. “The administrative investigation continues.”

Smith was investigated for attempted forcible sodomy for an encounter with the dispatcher’s daughter, who goes by the name Celeste Guap, on Feb. 1 at Wildcat Canyon Regional Park in Richmond, according to Paul Graves, who oversees the sexual assault unit in the Contra Costa County District Attorney’s Office. This newspaper is not using Guap’s real name.

Oakland police filed the case with Graves on May 17, but Graves said there was insufficient evidence to charge Smith with a crime. Guap was 18 at the time.

Smith, according to city records, resigned the same day the police department sent its investigation to the District Attorney, who declined to file charges later that day.

The 2014 graduate of Oakland’s police academy and his academy classmate James Ta’ai have been identified by sources as the officers who resigned in the wake of the investigation. Two other unnamed officers remain on paid administrative leave.

Multiple police sources said Smith and Ta’ai initially denied involvement with Guap.

But their accounts fell apart after Guap willingly gave Oakland internal affairs her cellphone, the sources said.

The remaining officers being investigated could be terminated or face other discipline for lying to investigators, violating police department rules, general conduct or damaging the department’s reputation.

The alleged sexual misconduct surfaced in September after Oakland police Officer Brendan O’Brien shot himself to death, leaving behind a note accusing officers of having relationships with Guap.

She has declined to comment.

An apparent botched investigation by Oakland internal affairs over the allegations caught the attention of the federal monitor who oversees the department, which opened its own investigation.

The Oakland Police Department, the federal monitor and the Alameda District Attorney’s Office continue to investigate the allegations between officers and Guap.

Last month, civil rights attorney John Burris said key questions of who knew what and when remain unanswered. He characterized the officers in question as a fraternity that passes around the same girl, does “it for fun” and covers up for one another.

Mayor Libby Schaaf, while not naming specific officers but discussing the case, expressed anger.

“In this case, the conduct that we don’t tolerate is not just the sexual misconduct that has caught everyone’s attention, but the lying about it and the tolerance of it,” Schaaf said.

In a related development late Thursday, multiple sources confirmed that police Chief Sean Whent will be leaving his post immediately. The news was expected to be announced at an 11 a.m. news conference Friday.

David DeBolt covers Oakland. Contact him at 510-208-6453. Follow him at Twitter.com/daviddebolt.