(CNN) -- Robin Williams was sober but was struggling with depression, anxiety and the early stages of Parkinson's disease when he died, his widow said Thursday.
The diagnosis of the progressive illness was "an additional fear and burden in his life," a person familiar with Williams' family told CNN on Thursday.
Parkinson's disease, depression linked?
Williams was found dead in his Northern California home Monday from what investigators suspect was a suicide by hanging.
While fans and friends have looked for answers to why the 63-year-old comedy icon would take his own life, his wife, Susan Schneider, issued a written statement about Williams' health that he had kept a secret.
The diagnosis of the progressive illness was "an additional fear and burden in his life," a person familiar with Williams' family told CNN on Thursday.
Parkinson's disease, depression linked?
Williams was found dead in his Northern California home Monday from what investigators suspect was a suicide by hanging.
While fans and friends have looked for answers to why the 63-year-old comedy icon would take his own life, his wife, Susan Schneider, issued a written statement about Williams' health that he had kept a secret.