Judge Alex Kozinski, of the 9th US Circuit Court of Appeals, who is one of America's most prominent jurists, publishes an article enumerating the serious flaws in the present criminal justice system in California. There article can be read here. You can also download it directly as a pdf here.
I began to list the more salient points – but there are too many. Please take the time to read this – it is a pleasure, and it is enlightening, and it is frightening.