Mary Kate did she/didn't she Heath Ledger case officially closed!

According to People, the case is closed.

and no charges are being filed.

When Heath Ledger was found dead in his Soho apartment on January 22nd, and even though the coroner determined that the ctor died of an accidental overdose of prescription drugs for pain, anxiety and sleep, because of some mysterious phone calls to Mary Kate Olsen's phone, and the fact that her bodyguards were on the scene a mere 4 minutes after 911 was called, and because Mary Kate declined from giving any sort of statement...

she was subpoenaed by a federal grand jury on April 23.