Gerhardt Konig has been charged with second-degree attempted murder.

Hawaii doctor appears in court on attempted murder charge“GMA” reports on the trial of a Hawaii doctor accused of trying to kill his wife during a hike as he faces a second-degree attempted murder charge.
Jamm Aquino/Honolulu Star-Advertiser via AP

Attorneys painted competing narratives of what happened a year ago on a Hawaii hike during opening statements Thursday in the trial of a doctor accused of trying to kill his wife on the Oahu trail.

Gerhardt Konig has been charged with second-degree attempted murder. The anesthesiologist is accused of beating his wife, Arielle Konig, with a rock on the Pali Puka Trail on Oahu on March 24, 2025. He has pleaded not guilty.

During opening statements in the Honolulu trial on Thursday, prosecutor Joel Garner said the couple, who have two children together, were visiting Oahu from their home in Maui for Arielle Konig’s birthday when the incident occurred.

“Help! Help! Help!” Garner said at the top of his opening statement, words he said Arielle Konig yelled out during the alleged attack.

Garner claimed that while the two descended the trail, Gerhardt Konig pushed his wife toward the edge of a cliff and then they struggled while on the ground. During the fight, Garner said Arielle Konig hit a syringe out of her husband’s hand and then tried to take a vial from him.

“The defendant says, ‘I’m sick of this s—,'” Garner said.

Things seemed to calm down, when, according to Garner, Gerhardt Konig picked up a rock.

“Just when she thought the defendant had calmed down, he starts to take that rock and bash her in the head multiple times,” Garner said.

Garner said two women who heard Arielle Konig’s cries for help saw Gerhardt Konig holding a rock in one hand while on top of his wife. He said they helped Arielle Konig down the trail, while an hourslong manhunt ensued before two officers found Gerhardt Konig leaving the forest.

Before his arrest, Gerhardt Konig called his teenage son and allegedly confessed, according to Garner.

“He says, ‘I’m not going to make it back. I tried to kill Arielle, but she got away.’ That’s what the defendant tells him,” Garner said.

The defendant then allegedly told his son his motive — claiming that his wife has been cheating on him and “I’m at the end of my rope,” Garner said.

Several months before the hiking incident, Garner said the defendant found “flirty” WhatsApp messages between Arielle Konig and a coworker, and that the couple went to counseling and she thought things were “getting better.”

Gerhardt Konig, charged with the attempted murder of his wife, enters a courtroom in Honolulu, May 13, 2025.
Jamm Aquino/Honolulu Star-Advertiser via AP

Arielle Konig suffered injuries, including large lacerations to her face and head and was hospitalized in serious condition following the alleged attack, according to the probable cause document for Gerhardt Konig’s arrest.

Arielle Konig, who filed for divorce in May 2025,is set to testify in the trial on Tuesday.

Garner told jurors they’ll also hear from Gerhardt Konig’s son, the two women who came upon the couple on the trail and the officers who apprehended the defendant. He said they will also see photos of the bloody path, Arielle Konig’s injuries and the “jagged” rock recovered from the scene, among other evidence.

Defense attorney Thomas Otake, meanwhile, said Gerhardt Konig has been falsely accused of attempted murder and refuted the state’s recounting of events while delivering his opening statement. He claimed that Arielle Konig started what he called an “unplanned, unanticipated scuffle” between the couple and hit her husband with the rock first, during an argument stemming from her alleged affair.

“She attacked him, pushed him, and they ended up in a scuffle on the ground,” Otake said.

Otake denied that the defendant tried to push his wife off the cliff or had syringes, but said Gerhardt Konig did hit his wife with the rock once in response, resulting in a “severe laceration” that bled a lot, as evidenced by “graphic photos.”

“But you’ll hear, medically speaking from the medical doctors in this case, it’s not as bad as it looks,” Otake said.

Otake also denied that Gerhardt Konig made a confession to his son, but instead called him to apologize and say goodbye after feeling remorseful about what happened and dealing with the prospect of his marriage being over.

“He stayed up on the mountain, and he was suicidal. He was going back and forth between jumping off the cliff,” Otake said, as Gerhardt Konig got visibly emotional while listening to the opening statement.

Otake said jurors will hear a “complex, long, human story.”

“It’s also, the evidence will show, gonna be a sad one for everyone involved — for Miss Konig, her kids and for Gerhardt,” he continued. “But it’s not a simple story.”

Gerhardt Konig has been in jail since his arrest. A judge denied his motion to dismiss the indictment last month.

Konig worked as an anesthesiologist on Maui. Following his arrest, Maui Health said his medical staff privileges at Maui Memorial Medical Center have been suspended pending investigation.