HONOLULU (AP) — A doctor accused of trying to kill his wife on a Hawaii hiking trail pleaded not guilty in court Monday on an attempted murder charge.

Gerhardt Konig’s wife says they were hiking in Honolulu last month when he grabbed her, pushed her toward the edge of a cliff, attempted to inject her with a syringe and then bashed her head with a rock, the woman wrote in a petition for a temporary restraining order against him.

The Associated Press does not name people who are victims of domestic violence unless they consent to be identified or decide to tell their stories publicly.

Since his indictment March 28, Konig has been held without bail.

Defense attorney Thomas Otake told the judge he plans to file a motion requesting bail. There should be some bail because Konig has no prior criminal record, Otake said.

Konig appeared for the brief hearing via video from the Oahu Community Correctional Center.

“Dr. Konig’s not guilty plea this morning was not just a formality, but a substantive response to the allegation that he tried to kill his wife,” Otake said in a prepared statement he distributed to reporters before the hearing.

“There are two sides to every story, and thus far only one side has been shared,” Otake said. “The other side to this story will be shared within the court process at the appropriate time.”

If convicted, Konig could face life in prison.

The couple were visiting Oahu to celebrate her birthday while their two young sons stayed home on Maui with a nanny and family, according to the wife’s petition filed in family court. A judge signed an order saying Konig must stay away from his wife and their children.

The petition for a restraining order said that in December, Konig accused his wife of having an affair. They have since been in therapy and counseling, she said.

In the petition, she also said her husband has sexually abused and assaulted her.

On March 24 during their recent trip, Konig suggested they go on a hike in Honolulu that she described in the petition as having “narrow ridge sections with steep drop-offs on both sides.”

What is known as “Pali Puka” trail is closed because the route is unsafe, the state Department of Land and Natural Resources said. Hikers often enter through a small clearing near a popular lookout point that offers stunning views despite a warning: “Area Closed! Do not go beyond this sign.”

“During the hike, I became uneasy and informed Gerhardt that I did not want to continue,” the woman said in her petition. “Gerhardt hiked a little further and then came back to get me.”

At one point, he grabbed the woman by her upper arms and started pushing her toward the cliff’s edge while yelling that he was sick of her, she said.

They began wrestling and she screamed and pleaded for him to stop, fearing for her life, the petition says.

During the struggle, she said he took a syringe from his bag and tried to inject her.

“I do not know what was in the syringe, but Gerhardt is an anesthesiologist and has access to several potentially lethal medications as part of his employment,” she said, adding that she bit his arm in an attempt to defend herself.

He appeared to calm down, but then grabbed a nearby rock and “began bashing me repeatedly on the head with it,” she said.

Two women on the trail saw what was happening and said they were calling 911.

The women helped her down the trail while Konig went in another direction.

Gary Soares, a parking lot attendant at the state park that includes the Pali Lookout, recalled Monday seeing a bloodied woman come down from the trail.

“She was bleeding from her head, so you know we just had to wrap her head, stop the bleeding,” he said.

Konig fled the scene, prompting an hourslong search and the closure of the park, police said.

“They locked down the whole Pali Lookout,” Soares said. “Everybody had to leave.”

An ambulance took the woman to a hospital and her husband was arrested that evening.

“It’s sad because he’s a doctor from Maui,” Soares said. “Doctors we should trust to care of us.”

Konig is an anesthesiologist at Maui Health, which operates hospitals and clinics in Maui County and is an affiliate of Kaiser Permanente. Maui Health said in a statement to media organizations that he was suspended pending investigation.

Kaiser Permanente said in a statement that Konig is not an employee, but is employed by an independent entity contracted to provide medical services. Kaiser said it has suspended his credentials and ability to treat patients pending investigation.