It is probably fan mail. I've noticed that when there is a big case and the evidence looks overwhelming one way, there is always a group of people who post all over the internet to take the opposite position. You see their screen names appear in various sites. Some of the same people who supported Casey Anthony are now supporting Jodi Arias. While anyone might question evidence and express a different point of view in any particular case, there seems to be a personality type that relishes being in the minority group and will take that view every single time (Amanda Knox is guilty, Casey Anthony is innocent, etc.). It appeals to something in their personalities.