Detailed text transcripts for TV channel - CNN - 20171122:11:33:00
>> reporter: but his biggest battle was yet to come. in 2017, cassidy revealed that he suffered from dementia. his mother had died of complications from alzheimer's disease only a few years before. >> to watch someone that raised you and was so vibrant start to lose her mind and disappear, is the most painful thing i have ever experienced. >> reporter: looking back on his own life, there is one memory cassidy hopes will never fade, his 1972 concert in madison square garden. cassidy leaped onto the stage in a signature white sequin jump suit, thousands of adoring fans screamed his name, his own...
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