NEW YORK — The NYPD’s DNA database is comprised of an ever-growing number of genetic profiles of thousands of innocent New Yorkers, including children, a lawsuit alleges. The Legal Aid Society, in a suit filed Monday in Manhattan Federal Court, is asking a judge to declare unconstitutional the “practice of secretly taking, analyzing and maintaining peoples’ DNA in its suspect index.” The public defenders group seeks an order the NYPD expunge those DNA files and records. There are 31,826 DNA profiles in the database at last count, according to the suit. The database, which is maintained by the …