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.

At age 3, a wounded Mariska Hargitay was nearly abandoned at the scene of the car crash that killed her famous mother, Jayne Mansfield, a new documentary reveals. In “My Mom Jayne,” Hargitay’s personal project that had its US premiere Friday at Carnegie Hall as part of the Tribeca Festival,