The singer recently paid homage to his "angel in heaven."
The "Suicide Squad" actor has not yet publicly commented on his father's death.
Rickey E. Smith Jr. was only 36-years-old.
Authorities want to know who prescribed the "Purple Rain" singer the pain meds that might have killed him.
Nancy Reagan, wife of former President Ronald Reagan, died from congestive heart failure Sunday. She was 94-years-old.
Natalie Cole, legendary R&B singer and daughter of Nat King Cole, died at a Los Angeles hospital on New Years Eve.
Singer William Guest, an original member of Gladys Knight and The Pips, died of congestive heart failure on Christmas Eve
