I was recently reading a textbook, written by a professor from an elite university, which I was finding to be very informative and well-written. Excited to learn of other works or talks by this individual, I searched for him on Google, but was extremely dismayed to find the results page full of news articles about his improper personal conduct and trouble with the law that resulted in his being forced to retire from teaching.

I'm now unsure whether I should continue reading his textbooks--they appear to be correct, well-written and insightful, but I might feel embarrassed now to keep them on my bookshelf or tell someone I had studied them. Should I avoid reading and learning from his work? And, more out of curiosity, should individuals publishing work in his field avoid referencing his texts or published research?

I left out a lot of the specifics, so more general thoughts or comments about this are welcomed.