Mariska Hargitay

Mariska Hargitay’s new documentary, “My Mom Jayne,” reveals a new and heartbreaking information about the night his mother Jayne Mansfield died.

While filming his debut as director, the star of the “Special Victims Unit: Victims” learned of how he accidentally left in the scene of the car accident that killed his mother and two other people.

Looking back that night, Zoltan first wonders why their mother decided to move to the car’s front seat while arguing with her boyfriend, Sam Brody, while her children gave a nap on her back.

“I often think about why not only stayed in the back seat with us,” he says in the movie.

John Nation through Getty Images

Zoltan says he remembers that his mother comforted him during the trip, then “twenty minutes later, half an hour, I heard her shout so strongly, and that was all.”

Following the accident, Mariskka’s older brother and Zoltan, Mickey Hargitay Jr., remembers that he thought his mother sitting in the front seat of the car in which he was, just to realize that he was “in a car with a blonde woman who had helped rescue the children.”

Sunset Boulevard through Getty Images

However, it was Zoltan, when he woke up and noticed that his younger sister Mariska, then only 3 years, was not in the car with them. He asked the adults where he was, and the group returned to the accident to find her.

According to children’s stepmother, Ellen Hargitay, adults initially lost Mariska because they had lodged her under the passenger seat with a head injury.

“Thank God that Zolie woke up,” says the stepmother of the Hargitays in the movie.

“My Mom Jayne” premiered last Thursday during the Tribeca Film Festival, and will premiere in HBO and Max on June 27.