He was charged 30 years ago, but consulted for many years after his release (only 25 years ago). So definitely his activities would be included in the last 20 y

He was charged 30 years ago, but consulted for many years after his release (only 25 years ago). So definitely his activities would be included in the last 20 years. Even if that wasn't the case, why should something that was OK 30 years ago be so crazy that we shouldn't do it now? Hint: no reason at all, "people would be horrified at X behavior Y years in the past" is and always was a poor argument, even when it's true (which again in this case it is clearly not).