An anesthesiologist accused in Hawaii of trying to kill his wife during a cliffside hike faced juror deliberations Tuesday after prosecutors laid out a theory of planned violence, including an alleged attack with a rock and an attempted stabbing with a syringe. Prosecutor Joel Garner told the jury that pieces of a rock broke off in Arielle Konig’s scalp after Gerhardt Konig struck her during the hike near a popular scenic lookout in Honolulu.
Garner said Gerhardt Konig, 47, carried what he described as a series of plans for murdering his wife during a weekend trip to Honolulu for her birthday in March 2025. Garner told jurors that when pushing her off a cliff did not work, Konig tried to stab her with a syringe filled with an unknown substance. Garner said that too did not work, and that Konig then grabbed a rock.
“Every backup plan ends in Arielle’s death,” Garner said in court, according to the AP report, while displaying the rock and photos of injuries. Prosecutors also told jurors that blood on the rock and on clothing belonged to Arielle Konig, not to her husband.
Konig’s defense portrayed the case as a dispute over who attacked first and whether the state’s timeline made sense. Thomas Otake, the defense attorney, told the jury there were no plans to kill, and he argued that Gerhardt Konig repeatedly tried to cast doubt on Arielle Konig’s account. Konig’s lawyer pointed to questions about the prosecution’s narrative, including that if a person in a remote area intended to kill someone with a syringe, Otake said, it would be used first rather than during a fight.
“You would use the syringe first,” Otake said, adding, “It makes no sense.” Otake’s comments were made as the defense continued its effort to frame the prosecution’s evidence as inconsistent with attempted murder.
The trial began last month and is nearly a year after the hike on the Pali Puka trail ended with Arielle Konig bloodied and screaming that her husband had tried to kill her. The AP report said the couple’s two young sons stayed home on Maui while the Konigs were on the trip, and that the alleged assault occurred near a lookout offering sweeping views.
Prosecutors told the court that Gerhardt Konig attacked his wife near the lookout while, Garner said, he was upset about her relationship with a coworker. Garner told the jury the attack stopped only after two other hikers interrupted, according to the AP account.
Testimony during the trial also focused on the couple’s relationship leading up to the hike, including their respective accounts of what they discussed and what happened during the confrontation. Gerhardt Konig testified that Arielle Konig was having an affair and that he confirmed it by unlocking her phone while she slept. Arielle Konig testified that the relationship amounted to an “emotional affair” involving flirty messages with a coworker, and that it came up during the hike.
Arielle Konig testified that Gerhardt Konig grabbed her and moved her toward the cliff’s edge, but that she threw herself to the ground in an attempt to hold on. She said he straddled her, had a syringe in his hand, and she batted it away. She also testified that she bit his forearm and squeezed his testicles in an effort to get him off her.
For his part, Gerhardt Konig denied pushing her toward the edge and testified that she hit him with a rock first. He said he wrestled the rock away and hit her with it twice in self-defense. The AP report said Otake also argued that the prosecution’s theory conflicted with what he characterized as Gerhardt Konig’s character and intentions, and Otake quoted from a heart-shaped birthday card Konig wrote to his wife calling her “the heart of our family” and saying, “The kids and I hit the jackpot with you.”
Prosecutors told the jury about Konig’s actions after the alleged assault, including that he hid on the mountain for about eight hours before coming down and tried to flee when confronted by police. Garner also told jurors that Konig made no reference during a call he placed while on the mountain to hitting his wife in self-defense, and that during the call his adult son from a previous marriage told authorities Konig said he “tried to kill your stepmom,” a statement Konig denied making, according to the AP report.
Gerhardt Konig has pleaded not guilty to attempted murder. The AP report said Arielle Konig has since filed for divorce, and the trial’s testimony has been livestreamed by Court TV.