The popular radio DJ and TV personality was a mainstay on “American Top 40” and similar shows for decades, as well as the voice of well-known cartoon characters, such as Shaggy from ‘Scooby-Doo.’ Kasem, who suffered from Lewy body disease — a progressive form of dementia — had been at the center of a bitter battle between three of his adult children and his second wife, Jean, over his care.
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Sad news, but his health had been deteriorating for quite some time. He's been in and out of the news lately because of all the big arguments in his family about his care, and IIRC he actually disappeared for some time recently. Dementia is brutal; I can't imagine having to watch a loved one go through it.