Results had been expected today
It could take anywhere from a few days to a few weeks to find out what led to the Oscar-winning star's death last weekend at 46 years old.
Hoffman, a star whose work in films such as “The Master” and “Capote” was greatly acclaimed, was found dead in his West Village apartment of a presumed heroin overdose.
He was seen withdrawing $1,200 in cash from a New York City supermarket ATM on the night before his death and talking to two men with messenger bags, according to a CNN report.
Hoffman's former partner and the mother of his three children, Mimi O'Donnell, reportedly told law enforcement officials that she saw the actor near his West Village apartment on Saturday afternoon and spoke to him that night. Both times he appeared high, CNN reports.
Hoffman, who had spoken candidly about his history of addiction and had claimed to have been clean for decades, entered a detox program last year after relapsing.