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It's similar to Parkinson's disease, but the dementia doesn't happen right away. LBD can cause hallucinations, confusion and delusions among other symptoms which makes it different from Alzheimer's.

"In November of 2013, he had a little gut pain. Next month, it was another symptom," Susan Schneider said. "It was like this endless parade of symptoms."

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She says Williams didn't show signs of being suicidal but says the "chemical warfare no one knew about" was going on in his mind.

Popular radio host Casey Kasem, who died just months before Williams, was also diagnosed with LBD.

Currently, there's no cure for Parkinson's or LBD.

This video includes an image from Getty Images and Jensflorian / CC BY SA 3.0

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Prosecutor Skandalakis has previously suggested that pursuing criminal charges against President Donald Trump may not be feasible until after he leaves office in 2029. (Craig Hudson/Politico/Bloomberg via Getty Images)

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