No personal experience but how about calling and sending a certified letter to Rush Baker, Kevin Maxwell, your rep on the board of education. And CC your principal, head of your PTSA, your attorney, and the police officer handling your case. Make sure they each get a copy.
And ask the ombudsman to help.
http://www1.pgcps.org/ombudsman/
Maybe this group could help - scroll down for a sample letter and a link to state laws. And it says "Please contact PACER’s National Bullying Prevention Center for more specific guidance regarding your particular circumstances."
If that doesn't help. Go to the press.
Good luck