Mother of D’Wan Sims dies without answers in son’s 1994 disappearance D’Wan Sims went missing Dec. 11, 1994 Tags: LIVONIA, Mich. – Local 4 has been following the disappearance of D’Wan Sims for nearly 26 years. After years of tips, clues and dead ends, his mother, Dwanna Wiggins moved to North Carolina, where she passed away Monday. Police claim she died from a heart attack. “We actually got the call this morning Ms. Sims had passed away” said Captain Ron Taig with Livonia Police. Taig said he’s had numerous conversations with Dwanna Wiggins over the years. It’s the case he will never forget and still hoping they will solve. Taig said the death of Dwanna will make things more difficult to do that, but the case is not over.