Sadly I believe he will be indicted. The prosecutor has the ability to only present the facts that are convenient to his case to a grand jury while ignoring all the facts that clear the suspect. Due to this, in nearly 100% of cases grand juries indict.
I expect that the justice system will take a good amount of time with the grand jury process. When the grand jury comes back to either indict or not indict ... this serves as another flash point for the mob. I expect the government wants some time to pass before this happens, hoping that the out of town agitators go home.