An individual with a history of criminal behavior has been sentenced following a violent road rage incident involving a woman and her teenage daughter. The confrontation led to an assault charge for Nathaniel Radimak, 39, who was sentenced in a Hawaii court on Wednesday.
The incident, which gained widespread attention in 2025, occurred when Radimak aggressively approached Diane Ung as she was instructing her daughter, Iwalani, on how to park. At the time, Radimak was already on parole for a similar offense committed in California. Although he was initially sentenced to five years in prison for that crime, he was released in less than a year and subsequently involved in the Hawaii attack.
Now, Radimak has received a seven-year prison sentence for his actions in Hawaii, with credit for time served since his arrest in May of last year.
The alarming road rage event took place on May 7, 2025. Radimak sped past Ung and her daughter, nearly colliding with their vehicle as they practiced parallel parking outside their home. When Iwalani shouted for him to “slow down,” Radimak turned his car around and approached the pair, escalating the situation into a confrontation.
The shocking road rage nightmare unfolded on May 7, 2025, when he sped past Ung, who was teaching her daughter how to parallel park outside their home.
He almost clipped their car, and her daughter yelled at him to ‘Slow down!’ The comment prompted Radimak to turn his car around and confront the mother and daughter.
Ung told local news outlet KITV at the time that her baby was asleep in the backseat of the car when Radimak confronted them.
She recalled that Radimak yelled at the teen before approaching the window and punching Iwalani in the face.
Nathaniel Radimak, 39, has been sentenced to seven years in prison for a road rage attack last May. He’s pictured above in a previous booking photo
Radimak, pictured above during sentencing, was charged with two counts of third-degree misdemeanor assault and one count of felony unauthorized entrance into a motor vehicle in the first degree
Radimak apologized in court during his sentencing hearing, pictured above. He previously pleaded ‘no contest’ to the charges against him
The furious mother then leaped out of the vehicle to defend her daughter and hurled an iced coffee at his car.
‘And he came running across the street, struck me like a Superman punch right inside my face,’ she recalled.
‘I fell down to the ground, big gash in my head. And I’m just like, “Go check on the baby. Don’t worry about me. Go check on the baby,” Ung remembered telling her daughter.
Ung had a cut above her left eyebrow from the attack and required eight stitches. Radimak was charged with two counts of third-degree misdemeanor assault and one count of felony unauthorized entrance into a motor vehicle in the first degree.
He initially pleaded not guilty to the charges but entered a ‘no contest’ plea earlier this week.
‘Based on the defendant’s presentence investigation, it is evident that the type of criminal conduct in this case was in no way a one-time aberration for the defendant,’ Deputy Prosecuting Attorney Hon-Lum Y. Cheung-Cheng said of the sentencing.
‘Time and time again, the defendant keeps engaging in similar conduct. The roads may change, but the defendant’s behavior does not, and will not change.’
Radimak was on parole in California from unprovoked road rage violence when he attacked two Hawaiian woman. He’s pictured above during his arrest in California
Radimak apologized in court for the attack. He said he did not plan on it and needed a ‘certain kind of treatment.’ He is pictured above in a social media post
Radimak’s attorney, Rosa Flores, argued that his actions were a result of schizophrenia, bipolar disorder and post-traumatic stress disorder, local Fox affiliate, KHON reported.
‘He was actively seeing his medical providers in the months leading up to the May 2025 incident, and the medication kept getting changed,’ she told reporters.
‘He was reporting side effects to that, so he was actively trying to see what he could do about seeking better medication.’
Radimak apologized for his crimes at the hearing, telling the court: ‘This was not on the agenda that day. I regret it, like I said. I take accountability. Just feel bad about it. It shouldn’t have happened. I really need a certain kind of treatment.’
Judge Clarissa Malinao determined that Radimak was a ‘danger to the safety of the public’ with a ‘lengthy history’ of similar road rage crimes.
The sentence comes after Radimak made headlines in California for being the ‘Tesla road rage guy.’
He had terrorized multiple women on the road and was caught on camera using a metal pipe to bash the cars of his victims in numerous unprovoked attacks between 2022 and 2023.
Radimak was previously sentenced in a California court for road rage attacks against women. He was released after one year behind bars and is pictured above attacking motorists with a pipe in Los Angeles
Diane Ung, pictured above, told KITV at the time of the attack that Radimak violently confronted her and her teenage daughter while they were practicing parallel parking
The attack last year was seen on surveillance footage, pictured above, which revealed the moments Radimack confronted the mother and daughter
Radimak was found guilty of criminal threats, vandalism, assault, and elder abuse in the California case.
Attorney Gloria Allred, who represented four of his victims, previously told the Honolulu Star-Advertiser that she would seek his extradition from Hawaii.
However, Radimak’s attorney said his parole will expire in August, so he will serve his sentence in Hawaii.
The Daily Mail has reached out to Radimak’s representation and the county prosecutor’s office for additional comment.
