(Aug. 4) -- According to a report in the New York Post, Mary-Kate Olsen is refusing to talk with federal investigators about the death of 'The Dark Knight' star Heath Ledger unless she's given immunity. On the day of Ledger's death, Olsen was the first person called when her masseuse discovered the actor's body.
The Post reports that Olsen's lawyer has rejected several attempts for the former 'Full House' actress to be questioned, and that she may be subjected to a grand-jury subpoena to discuss what she knew about Ledger's life and death.
"Everyone has been very eager to help, saying what a great guy Heath Ledger was, everyone except Mary-Kate, who has refused to speak," a Post source said.
Ledger died in January due to an accidental overdose of prescription medication. His final acting role as The Joker in 'The Dark Knight' has earned him Oscar buzz, and propelled the movie to nearly $400 million in ticket sales.