Burkman is asking that D.C. police release the information within 10 days. Named as defendants in the lawsuit are Mayor Muriel E. Bowser (D) and D.C. Attorney General Karl A. Racine.
Rich, 27, was shot July 10 in the District's Bloomingdale neighborhood. D.C. police have repeatedly said that they think Rich was killed in a random robbery attempt, but several conspiracy theories have emerged about his death. No arrests have been made.
"The family remains completely confident in the Metropolitan Police Department's handling of the case," Brad Bauman, a spokesman for the Rich family, said in a statement.