Most attorneys say that a circumstantial case is stronger. An eyewitness can be impeached by their eyesite, their motivation and their ability to see in certain conditions. Circumstantial cases are very much okay.
As we speak, Michael Skakel (the Kennedy cousin) is sitting in jail on a circumstantial case 27 years old ... and NO DNA evidence.
BECAUSE of CONFESSIONS he made to TOO MANY PEOPLE. Not due to any evidence at all. If it was the evidence, he would have been convicted a long time ago. It would be nice if you would get your facts straight and quit trying to use totally unrelated cases and information to make your point.