Mariska Hargitay honors her mother, Jayne Mansfield, in a powerful new HBO documentary that uncovers hidden truths, legacy and lasting impact.

Mariska Hargitay’s new documentary, “My Mom Jayne,” reveals heartbreaking new information about the night her mother Jayne Mansfield died. While shooting her directorial debut, the “Law & Order: Special Victims Unit” star learned how she was accidentally left behind at the scene of the car crash which killed her mother and two other people.

In her documentary My Mom, Jayne, Mariska Hargitay wants to understand the essence of her screen siren mother Jayne Mansfield, who was killed in a car crash when the Law & Order: SVU star was 3.