You are absolutely right about judging the Dad on the basis of his appearance. However, I cant use a broad brush in saying only the poor, or uneducated are suspect. Remember the well-dressed, well-spoken parents of Joh-Bennet? Who can tell who is guilty based on appearance? People who knew the BTK criminal - could they tell? People who knew Scott Peterson - they couldn't believe someone like Scott was guilty. There are very few who can be judged simply on appearance. Otherwise we would not have a concern about security at airports!
Yes, I however this case turns out maybe some Freepers will remember that just because a family is lower class it does not follow that they kill their kids.