Prosecutors say Gerhardt Konig tried to kill his wife during a birthday hike on Oahu, while defense lawyers say the violence erupted in self-defense during a marital fight.
HONOLULU, HI — A Maui anesthesiologist went on trial this month accused of trying to kill his wife on a narrow Oahu hiking trail, with prosecutors telling jurors he pushed her toward a cliff and beat her with a rock, and defense lawyers arguing the couple’s fight turned violent after she attacked him first.
Gerhardt Konig, 47, is charged with second-degree attempted murder in the March 24, 2025, assault on the Pali Puka Trail near the Nuʻuanu Pali Lookout. He has pleaded not guilty. The case matters now because it has moved from shocking allegations and court filings into a jury trial, where witnesses, first responders and family members are expected to give the clearest public account yet of what happened on the trail and what led up to it. The immediate stakes are high: Konig could face a life sentence if convicted, and jurors must weigh two sharply different versions of the same encounter.
Prosecutors said the couple had traveled from Maui to Oahu to celebrate Arielle Konig’s birthday when the outing turned violent on the late morning hike. Deputy Prosecutor Joel Garner told jurors that as the couple descended the trail, Konig pushed his wife toward the edge of a cliff, then struggled with her on the ground. Garner said Arielle Konig knocked a syringe from his hand and tried to grab a vial before the fight briefly seemed to settle. Then, Garner said, Konig picked up a jagged rock and struck her in the head multiple times. During opening statements, prosecutors said Arielle screamed for help as two women hiking nearby ran toward the noise. One witness described seeing a man on top of a bloodied woman with a rock in his hand. Prosecutors also said Konig later called his teenage son and admitted, “I tried to kill Arielle, but she got away,” describing a marriage strained by accusations of infidelity.
Defense attorney Thomas Otake told jurors the state’s version leaves out key details and overstates both planning and intent. He said the confrontation was not a prearranged murder attempt but an argument that spiraled after Konig confronted his wife about an affair. According to the defense, Arielle Konig struck her husband with a rock first, and he hit her back during what Otake called an “unplanned, unanticipated scuffle.” The defense has also challenged part of the prosecution’s theory by pointing to the absence of some physical evidence. Court coverage from the trial noted that a syringe, phone and other items prosecutors referenced were not recovered from the scene. Jurors have nevertheless been shown photographs of Arielle Konig covered in blood and have heard testimony from hikers who said they did not see the beginning of the fight but did see its aftermath. At this stage, one of the central unknowns is whether jurors will view the violence as a deliberate attempt to kill or as a chaotic fight without murderous intent.
The case has drawn attention far beyond Honolulu in part because of who the defendant is and how the allegations unfolded after the arrest. Konig worked as an anesthesiologist on Maui. After his arrest, Maui Health said his medical staff privileges at Maui Memorial Medical Center were suspended pending investigation, and Kaiser Permanente said he was not its employee but was credentialed through an outside entity and had been suspended from treating patients. The trail attack also prompted a manhunt that lasted for hours. Police said Konig fled after the assault, forcing the closure of a nearby state park before officers arrested him shortly after 6 p.m. following a brief foot chase. Earlier court filings from Arielle Konig described a marriage under strain for months, saying her husband became intensely jealous after accusing her in December 2024 of having an affair. Those filings also alleged controlling behavior, counseling attempts and other abuse claims. Those allegations are part of the broader context around the couple’s relationship, but the criminal trial is focused on what prosecutors say happened on the trail that day.
The procedural path has been unusually visible. Konig was charged in the days after the attack, later indicted and has remained jailed without bail since that spring. He pleaded not guilty in April 2025. Arielle Konig also sought a temporary restraining order covering herself, the couple’s two young children and other family members, but that petition was later dismissed after her lawyer said it was not needed while Konig remained in custody. Trial began in Honolulu in March 2026, nearly one year after the alleged attack. Prosecutors told jurors they planned to call the two hikers, police officers who took part in the search and arrest, and Konig’s son, who they say heard an admission over the phone. ABC News reported on March 24, 2026, that Arielle Konig was expected to take the stand that day. The next major steps are the remainder of witness testimony, possible forensic evidence disputes and, after both sides rest, jury deliberations on the attempted murder charge.
Some of the most vivid testimony so far has come from the hikers who interrupted the struggle. Court coverage said the women were nurses who had just started their hike when they heard cries of “Help me! Help me!” Sarah Buchsbaum testified that she and her friend first thought someone had fallen off the cliff and ran toward the screams. Another witness, Amanda Morris, said she saw Arielle Konig lying on her back, covered in blood, with a man above her. Buchsbaum said the man had what she described as a cold look in his eyes. Prosecutors also played the 911 call made from the trail. The emotional weight of those accounts has underscored how public the final moments of the encounter became, even though much of the struggle itself happened out of view. Konig appeared emotional in court during opening statements, at times wiping away tears, as both sides argued over whether the scene was the end of a murder attempt or the aftermath of a mutual fight.
For now, the case stands at a critical midpoint: jurors have heard the broad outlines from both sides, the wife was expected to testify on March 24, 2026, and the trial is expected to continue for several weeks before the panel decides whether prosecutors proved attempted murder beyond a reasonable doubt.
Author note: Last updated March 24, 2026.