“The Cosby Show” alum Keshia Knight Pulliam paid tribute to her former co-star Malcolm-Jamal Warner after his death at age 54 with a touching social media post on Sunday. Knight Pulliam, 46, shared an Instagram video of Warner playing bass guitar onstage for a live audience at City Winery in Atlanta.

The sudden and heartbreaking death of beloved actor Malcolm-Jamal Warner, best known for his role as Theo on The Cosby Show, has left fans reeling—and now, new and conflicting details about what actually happened that day in Costa Rica are sparking confusion and conspiracy theories across social media.

The actor made famous by playing Theo Huxtable in "The Cosby Show" died this weekend in an accident in Costa Rica.