I try to put aside my emotions when watching a trial, and see if the evidence presented meets "the burden of proof", and in spite of how I feel about the defendant, the victim's family, or the horrendous nature of the crime, I try to keep an open and logical mind, using all the reason and experience my 58 years on this sorry earth have allowed me to develop, so far!
Try to be a bit more objective, and a bit less emotional, as I really think it will help you to understand why others may not share your opinion regarding the possible guilt of David Westerfiled.