Gibson/Grigorieva Former Babysitter Dead?

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August 16, 2010 | 9:00pm EST

A babysitter who was expected to be a key eyewitness to Mel Gibson’s alleged rages in his custody battle with ex-girlfriend Oksana Grigorieva has died, according to TV reports.

Reports suggest the unnamed Hispanic child minder, who lost her battle with cancer at the weekend, witnessed the actor/director’s alleged attacks on the Russian singer.

The babysitter even featured in Gibson’s phone rants that were taped by Grigorieva and leaked to the media earlier this summer.

He told Grigorieva he would fire the woman if she agreed to babysit the couple’s daughter Lucia at her mother’s house and reminded the Russian, “I’m her employer, not you.”