Name PhD's who have spoken out against the OJ verdict?
A better example would be Casey Anthony -- who has spoken out against her verdict that meets your criteria?
With respect to Knox we have John Follain who is a highly respected journalist and who has had who has at least a half-dozen investigative books on crime that were very highly regarded.
You have
Luciano Garofano which I believe meets all your criteria having both a forensics and investiagtor background and currently a professor at a university teaching forensic investigation.
Graham Johnson a highly respected journalist who was the Investigations Editor for the Sunday Mirror. He is a talking head legal expert and like Follain has at least a half-dozen books on true crime. According to the wiki on him "He has been a finalist for "Reporter of the Year" three times and been described in parliament as an "investigative reporter supreme".
1
Wendy Murphy J.D. which based on her biography is an adjunct professor at New England Law, was a Visiting Scholar at Harvard Law School from 2002-2003, she is a trial and appellate attorney, founder and director of the Victim Advocacy & Research Group, and served on the Massachusetts Governor's Crime Commission and Commission against Sexual and Domestic Violence, and has testified before congress. She appears to have become a talking head legal analyst for four networks but I've never seen her show so it must be US only.
Nancy Grace -- she may be a bit excitable as a TV personality but she was a prosecutor for over a decade and if you ignore the theatrics of her shows she is actually almost always right.
Andrea Vogt a Fulbright scholar and award winning journalist. She is also the researcher and presenter of the documentary series Crime: Crossing the Line for BBC and A&E and has written at least one book on true crime.
Jeanine Pirro a former DA and judge turned legal analyst.
Clint Van Zandt a former FBI profiler who also seems to have turned legal analyst.
Now can you name someone who supports Knox who is not a crack pot or a person that I can show to be a liar?