OAKLAND — Four misdemeanor criminal charges have been filed against an Oakland police officer suspected in an attack last year on a probation officer at her Oakland hills home, the Alameda County District Attorney said Friday.

Officer Cullen William Faeth, arrested Dec. 7, 2015, was charged with two counts of misdemeanor battery, one count of trespassing and one count of public intoxication, according to court documents.

Faeth showed up at the home of Olga Cortez on Fieldbrook Place on the night of Dec. 7 and threw her to the ground and refused to leave, according to a probable cause declaration signed by Oakland police Sgt. Richard Vass on Feb. 26.

Cortez, an Alameda County probation officer for 18 years, filed a claim against the police department on Feb. 25.

Cortez said in a February news conference that she was taking a shower on Dec. 7 when she and her husband heard banging around 9:30 p.m. A man in his 20s, who appeared intoxicated, was banging on the door, demanding to be let in, she said. Her husband answered the door and told him to leave, although he allegedly forced himself in.

A second man also appeared, coming from the backyard and had what she thought was a gun in his hand, she said. He eventually ran off.

“I was terrified,” Cortez said. “(My kids) were scared. I had no idea if this person was going to shoot.”

She named the second person as another Oakland officer, Sgt. Joe Turner, in her claim against the city. The first officer, reportedly Faeth, allegedly jumped Cortez, grabbed her tightly and the two fell to the ground. She suffered bruises to her arms and right thigh from the attack, she said.

Besides asking for the owner of the home, Faeth did not give any explanation as to why he was there, Cortez said. She said they did not know the two men were police officers until the next day, when Oakland police told her.

She said a police captain came to her home at midnight, asking her to retell the story. Another five officers, including detectives, showed up at 3 a.m. and asked Cortez and her husband to recount the story and re-enact the incident. Cortez said she felt as if they were trying to get her to change her story.

An Oakland police internal affairs investigation began after the incident, police said in February.

The second officer, allegedly Turner, has not had charges filed against him.

Oakland police released a statement Friday that it has completed its own internal investigation, and pending an administrative process, Faeth remains on paid leave. Faeth, who is the son of a current Oakland police sergeant, graduated from a police academy in Napa.

“The Oakland Police Department takes all allegations of misconduct involving our employees seriously. We hold all of our employees to a high level of ethical and professional accountability and will not tolerate criminal behavior,” the statement said.

Faeth was placed on paid administrative leave after the incident, as were three other officers. Besides Faeth and Turner, it’s unclear which other officers were being investigated by the department.

Faeth’s attorney, Bill Rapoport, said he could not talk about the case. Faeth will appear in court on April 21.

Contact Angela Ruggiero at 510-293-2469 and follow her at Twitter.com/aeruggie.