Three months before his death Williams was diagnosed with Parkinson’s, but Schneider Williams has previously revealed the autopsy identified that he had suffered from Lewy body disease (LBD).
While had been diagnosed with Parkinson’s disease, Schneider Williams wrote that after his death it became apparent that, pathologically, he suffered from diffuse LBD.
Over the following months Williams suffered from panic attacks and memory loss, struggling to remember lines during the shooting of Night at the Museum 3.
His mental state declined, and Schneider Williams found herself increasingly unable to reassure his anxieties and insecurities.