A doctor who tried to push his wife off a Hawaii cliff laughed on the stand at his attempted murder trial as he recounted her grabbing his testicles during the incident.
Gerhardt Konig, 47, has admitted to bashing his nuclear engineer wife Arielle, 37, over the head with a rock at an Oahu beauty spot in March 2025, but claims he did so in an act of self-defense.
Arielle testified last week that Konig ‘forcefully’ grabbed her by her arms and pushed her toward a cliff before trying to inject her with a syringe and striking her on the head with a jagged rock.
But when the renowned anesthesiologist took the stand at his trial Wednesday, he told the court how Arielle allegedly assaulted him before he struck her.
Konig told the jury that his wife pushed him from behind after they had an argument about the affair she had with her co-worker Jeff Miller.
He then put his hands on her arms, but Arielle grabbed his wrist and threw herself to the ground, the court heard.
She wrapped her legs around his, grabbed him by the testicles and struck him in the head with a rock, Konig testified. He then wrestled the rock away from her and hit her in the head with it twice.
‘I try to free my testicles when I get both hands free,’ Konig said. ‘Everything happened really quickly when she grabbed my testicles,’ he added with a laugh.
Gerhardt Konig, 47, laughed on the stand at his attempted murder trial as he recounted how he tussled with his wife Arielle during her assault last year
Konig has admitted to bashing his nuclear engineer wife Arielle, 37, over the head with a rock at an Oahu beauty spot in March 2025, but claims he did so in an act of self-defense
Arielle Konig, 37, was captured on police body camera footage moments after her husband, Gerhardt, allegedly tried to push his wife off a ledge on the trail and attempted to stab her with a syringe before beating her with a jagged rock
Konig recalled how after the assault, Arielle scooted towards two hikers walking along the trail and told them that he tried to kill her.
He continued walking and called his son Emile on FaceTime, the doctor told the court. During the call, he said he planned to take his own life.
‘I decided to jump,’ he said, starting to cry. Konig claimed Emile ‘saved my life that day, but I put him in this position where he thinks I tried to kill her.’
The anesthesiologist said he was in a state of ‘severe emotional distress’ after the attack and felt horrible that he’d hurt his wife.
‘I felt horrified about what I did to her, the person I loved the most in the world,’ he told the court.
Konig told the jury how he and Arielle met on dating app eHarmony in 2016. They were both living in Pittsburgh at the time.
They married in 2018 and now have two sons, ages five and three. Konig also has two children, including Emile, from his first marriage which ended in divorce in 2014.
He and Arielle moved to Hawaii in 2022 because they wanted their children to grow up in a ‘safer’ environment.
He said he became suspicious that his wife was having an affair around December 2024 after he noticed some ‘red flags.’
![Konig started to cry on the stand Wednesday as he recalled how his son Emile 'saved my life that day, but I put him in this position where he thinks I tried to kill [Arielle]'](https://i.dailymail.co.uk/1s/2026/04/02/13/107610607-15701103-Konig_started_to_cry_on_the_stand_Wednesday_as_he_recalled_how_h-a-29_1775134278330.jpg)
Konig started to cry on the stand Wednesday as he recalled how his son Emile ‘saved my life that day, but I put him in this position where he thinks I tried to kill [Arielle]’
Arielle turned Konig’s medical supply bag over to police which contained syringes and medications that the defense alleges were meant to help him respond to an emergency
The jury on Wednesday was shown images of injuries that Konig suffered during the incident on March 24, 2025. He testified that the side of his face and ribs were injured after two police officers in stuck him several times
When Corporal Kevin Chun, of the Honolulu Police Department, arrived on the scene, he saw two Good Samaritans helping Arielle walk down the Nuuanu hiking trail near the Pali Lookout in Oahu as blood streamed down her head
Konig alleged that Arielle was constantly on her phone and hiding her screen from him, so he ‘unlocked her phone while she was sleeping.’
He discovered a WhatsApp thread between his wife and Miller, who was based in Maryland but traveled regularly for work, that began in June 2024.
The thread, which was created when Arielle and Miller were on a work trip in South Africa, had about two months’ worth of messages, the court heard.
He discovered the pair were sharing photos of themselves, but noticed the conversation was fragmented. He believed Arielle was deleting messages, he said.
‘I was devastated, obviously something was going on. I didn’t know what to do,’ Konig said, admitting he screenshotted the messages and downloaded them on his computer.
He then confronted his wife about the texts while on a trip in California with another couple. Konig said he told the other couple about the messages before he addressed his suspicions with Arielle directly.
Arielle last week testified that she had been in an ’emotional affair’ with Miller and exchanged some ‘flirty texts,’ but said that nothing physical ensued.
Konig told the jury how he was not satisfied by Arielle’s claim that the affair was merely emotional and decided ‘I have to catch her in a lie.’
Jurors were shown this photo of Gerhardt Konig at the beauty spot during his trial last week
Arielle and Gerhardt met on a dating app in 2016. They married in 2018 and share two sons
He secretly recorded conversations that Arielle had with her mother and best friend, and went through her financial records, the court heard.
On the morning of the attack, he learned that a $1.5 million insurance policy had been approved, which the defense alleges was Arielle’s motive for assaulting Konig.
Konig admits to bashing Arielle over the head with a rock on the Nu’uanu hiking trail near the Pali Lookout on March 24, 2025, but claims she attacked him first.
His defense has noted that police never found a syringe or evidence that he tried to inject his wife with any substance.
His attorney also argued the incident was a ‘human reaction’ to Arielle’s three-month-long affair with her co-worker.
Konig has pleaded not guilty to attempted murder. His trial is expected to continue through mid-April.
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