Tyler Lambert, the son of late Diff'rent Strokes star Dana Plato, died of a self-inflicted gunshot last Thursday -- almost exactly 11 years after the death of his mother. Unspeakably terrible, and yet only another harrowing event in Diff'rent Strokes's haunted biography: Plato died of a drug overdose in 1999; Gary Coleman sued his parents, filed for bankruptcy, and was arrested for assault; and Todd Bridges survived a drug habit so terrible that it justifies his memoir's title Killing Willis. Condolences. [People]