The man in the example I gave was indicted in more than 4 months because the physical evidence and eyewitness testimony proved there was sufficient reason to indict him. There was never a question that Michael Addison shot officer Michael Brown. He had no just cause to shoot him. And he wasn't "easily indicted". He was indicted because the evidence warranted it.
The evidence presented to the GJ in the case of Darren Wilson was the opposite, which is why he wasn't indicted. Contrary to what attorney Disney called him, the law doesn't see him as a "murderer".