What's the saying? Bench Trial if you're innocent, jury if you're not?
That said, looking at the evidence, I'm not sure.
They supposedly found Stockley's DNA under a screw on the revolver. Not somewhere it should be from just handling it.
They found no DNA of Smith's on the revolver, but did find his DNA on a bag of heroin, which had none of Stockley's DNA.
This day and age, why the hell would you handle any evidence without wearing gloves? Why would you feel the need to "safe" a weapon in a crime scene with a dead suspect before the CSI team arrives?
The rioting? Honestly, I wish they had phrased that to be more a warning than a threat. If you're going to find him not guilty, expect and prepare for riots, which could turn ugly if you're not properly prepared.