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The mystery surrounding Brittany Murphy's sudden death is deepening.
Hoping to clear up some lingering questions concerning toxicology tests, the Los Angeles County coroner invesigators paid another visit to the Clueless star's residence Wednesday to conduct follow-up interviews with her mother, Sharon, and husband, Simon Monjack.
"We were out there yesterday and interviewed her husband and mom in regards to trying to get some additional data for our investigation. They were very cooperative," Assistant Chief Coroner Ed Winter tells E! News. "[The investigation is] ongoing and we hope to close it soon."