Legal Question in Criminal Law in California

The only reasons are errors in the trial. You'll have to figure them out from review of the court file and transcript. That is what most people would hire an experienced attorney to do. He will need input from the client as to what you think was done wrong, typically a prejudicial denial or admission of evidence in dispute. IF you are still timely in bringing motions or appeals, and if you are serious about hiring counsel to do so, feel free to contact me.