Hey Rob -- imo, hell yes get a report or two or three. The police, the school administration for starters. If a public school, demand answers from the school board. I'd like to know, too, if criminal charges were filed against the bully. DCS/DCF may also be an option if you can do it anonymously and suspect he may himself be a victim of abuse.
You have options, and I'd explore them, to bump it up to the next level - the state - if you're not getting answers. But that's like a trump card and, personally, I wouldn't go waving it around. You know I have some recent experience with similar.
Also, educate yourself about local, if any, and state laws regarding bullying:http://www.seacoastonline.com/articles/20120817-LIFE-208140436
From what you've often described in other posts, this may be an excellent opportunity to have more than one issue addressed.