Because he has Parkinson’s Disease. It’s been obvious since 2020
Rigidity, shuffling gait. Frozen face. Muffled voice. And now obvious dementia.
And by the way 20-40 % develop hallucinations and delusions.
30 years as an ER physician.
Alzheimer’s or other age-related dementia has been obvious.
His head does not Bob.
His walking is consistent with progressing senility, not a motion disorder.