Listen Now: Simon Monjack 911 Call

ET has obtained the dramatic 911 call made last Sunday night, when the late Brittany Murphy's widower Simon Monjack was found unresponsive at their family home.

In the audio, a woman identifies herself as Monjack's mother-in-law and tells the dispatcher that Monjack was not breathing, and then she feverishly attempts to resuscitate him before help arrives.

Pending further investigation, police told ET that detectives believe Monjack died of natural causes. Ed Winter of the Los Angeles County Coroner's Office told ET that prescription drugs were found that belonged to Monjack. Late wife Brittany Murphy died on December 20, 2009 from pneumonia, with other conditions contributing but not directly related to the immediate cause of death being iron deficiency anemia and multiple drug intoxication.