“My Big little Brother,” Eddie Griffin, who starred alongside Warner in the sitcom “Malcolm & Eddie,” captioned an Instagram story tribute to the actor.

Malcolm-Jamal Warner was an actor I always greatly admired, which is why I was not only shocked but also deeply upset by his sudden passing at 54 from a drowning incident.

The Judicial Investigation Agency (OIJ) confirmed to PEOPLE that the actor's autopsy was completed on Tuesday, July 22, which showed that he died from accidental asphyxiation by submersion.