For Mariska Hargitay, perseverance is key

Mariska Hargitay, who has played Detective Olivia Benson in the police procedural 'Law And Order: SVU' for the past 19 seasons, has turned her clout as an advocate for victims in the upcoming HBO documentary, 'I Am Evidence,' where she also serves as producer. Photo: AP

Mariska Hargitay, who seems a constant in a field that usually lacks it, has produced a special documentary, I Am Evidence.

It examines the languishing DNA evidence stored in unexamined rape kits across the United States.