PHOENIX - Some of the heroin packets found in Philip Seymour Hoffman's home were stamped with the Ace of Hearts or the Ace of Spades.
The actor, who won an Oscar for his portrayal of writer Truman Capote, was found dead in his apartment Sunday of an apparent drug overdose.
Investigators say those types of heroin are often laced with fentanyl.
It's a prescription pain killer, which has been tied to dozens of recent deaths.
When mixed with heroin, the drug is sold under the street names of Theraflu, Bud Ice and Income.
Within the past year, police on the East Coast have seen a surge of overdoses with this mixture, most recently in Pennsylvania.
"The most rapid rise that we're seeing is the in the people in their teens and 20's but we still see the majority of people being in their 30s and 40s," said Medical Examiner Dr. Thomas Gilson.
Phoenix police officials said it hasn't seen any fentanyl laced heroin cases. However, that could all change with the quick popularity of this dangerous drug.