Brittany Murphy was murdered by the government in a bid to silence her support for a whistleblower, the 87-year-old father of the late actress claims.

Angelo Bertolotti says that at the time of her death, Brittany was being followed by secretive government agents who had tapped her phone and wanted to end her support for Julia Davis, who exposed weaknesses in the Department of Homeland Security.

The belief in this government conspiracy led Bertolotti to request a new toxicology test on Brittany Murphy.

When Murphy died in 2009, medical examiners determined that her cause of death was a combination of pneumonia, anemia, and drug intoxication. Bertolotti provided hair, blood and tissue samples for additional testing, and the results may give credence to his theory.

The new lab report indicates that Brittany Murphy may have been intentionally poisoned:

“Ten (10) of the heavy metals evaluated were detected at levels higher that the WHO [The World Health Organization] high levels. Testing the hair strand sample identified as [being from the] “back of the head,” we have detected ten (10) heavy metals at levels above the WHO high levels recommendation. If we were to eliminate the possibility of a simultaneous accidental heavy metals exposure to the sample donor then the only logical explanation would be an exposure to these metals (toxins) administered by a third party perpetrator with likely criminal intent.”

Family members had long been suspicious of the death and the fact that both Brittany and her husband died within a matter of months. Simon Monjack died not long after Brittany Murphy under similar circumstances.

“I called it two weeks after it happened,’ one family member told MailOnline. “You just don’t have two people die like that under those circumstances.”

Bertolotti noted that Brittany’s death came as she was being bounded by government agents.

“They were, in fact, under surveillance, including helicopters,” he told Fleur De Lis Film Studios. “Their telephones were wiretapped, Brittany was afraid to go home, because of the sneak-and-peek incursions into their residence and other terror tactics she suffered after speaking out in support of Julia Davis and being named as a witness in her lawsuit against the Department of Homeland Security.”

Bertolotti said he is writing a book that delves into his theory of how Brittany Murphy really died.