“At this point we have nothing that points us to reopening the investigation,” Winter told reporters.
“If there was additional evidence or someone came forward then we would direct them to law enforcement,” he added.
Brittany Murphy died six years ago on December 20 after suffering a cardiac arrest at her Hollywood Hills home.
The 32-year-old was found unconscious by her mother Sharon in the shower at the home that belonged to her husband Simon Monjack. Early autopsy suggested that she died of pneumonia combined with anemia and numerous drugs.