For what it's worth, I will pass along one thing I am aware of with Bobby Knight. After Fred Taylor suffered a brain aneurysm in 1996, he lived in Mill Run Gardens & Care Center, until his death in 2002. Bobby Knight regularly visited Fred Taylor throughout his time there and provided the financial support for Fred Taylor's care there.
My Grandfather was at this facility off and on between 1996 and 2000, and Bobby Knight would stop and talk and spend time with my Grandfather, when he was there. My family and I had the opportunity to speak with Coach Knight on several occasions while there, as well, and he was very nice in the conversations I had with him.
So, while much of his behavior is well documented, I did want to share a different side of him that I have personally seen, and been made aware of, FWIW.