Since January, Washington-based firm James E. Brown & Associates has filed more than 450 lawsuits against the District of Columbia. The firm, which represents families of students with special needs, claims unpaid attorney fees to the tune of more than $6.5 million.

The firm is part of a group of local attorneys who specialize in taking the school system to task over how it serves special-needs students. The city has a history of trouble with its special-education services, giving rise to a robust bar.