It’s been almost four years since U.S. actress Brittany Murphy died, but her father still wouldn’t give up on finding the real cause of her death. A new toxicology report claims that the “Clueless” star did not die of complications related to pneumonia, but from poisoning.

Murphy, 32, was found unresponsive by her husband, Simon Monjack, and her mother, Sharon Murphy, in their home’s bathroom on Dec 20, 2009. Medics transported her to the hospital, where she was pronounced dead on arrival.

In the following February, the Los Angeles County coroner declared that the primary cause of her death was pneumonia, with secondary factors of iron-deficiency anaemia and multiple drug intoxication, which they deduced was from over-the-counter and prescription medications.

In a cruel twist of fate, Monjack was found dead at the same house in Hollywood Hills five months after her death, and from the same cause of acute pneumonia and severe anaemia.

Murphy’s estranged father, however, did not believe that his daughter died from natural causes. Angelo Bertolotti has ordered an independent report on Murphy’s death after securing the release of her hair, blood, and tissue samples.

The coroner’s office did not test for poisons, toxins, or heavy metals.

The Carlson Company conducted the new tests, which show that Bertoloti’s suspicions were not unfounded.

According to the lab report obtained by the Examiner, Murphy was most likely poisoned.

“Testing the hair strand sample identified as ‘back of the head,’ we have detected ten (10) heavy metals at levels above the WHO [World Health Organisation] 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.”

Heavy metals are found in most rodenticides and insecticides. Those who suffer from acute heavy metal poisoning may experience headache, dizziness, coughing, sweating, abdominal cramps, wheezing, congestion, and disorientation.

Both Murphy and Monjack allegedly exhibited all the mentioned symptoms prior to their deaths.

“Vicious rumours, spread by tabloids, unfairly smeared Brittany’s reputation,” Bertolotti told the Examiner. “My daughter was neither anorexic nor a drug junkie, as they repeatedly implied.

“Brittany and Simon were ridiculed by The Hollywood Reporter, when they complained of being under surveillance and in fear for their lives. I will not rest until the truth about these tragic events is told. There will be justice for Brittany.”