By Deborah Becker, WBUR Deborah Becker, WBUR Massachusetts Attorney General Maura Healey said she will not bring charges against Suffolk County District Attorney Rachael Rollins after investigating an alleged disagreement in a Boston parking lot. But she has referred the matter to the state's Ethics Commission. "After conducting interviews and reviewing the available documentation and videos, we find no civil rights violations or violations of criminal statutes," says the letter from First Assistant Attorney General Mary Strother. Healey's office investigated a written complaint from Katie Lawson, of Dorchester, alleging that Rollins threatened to issue her a ticket and flashed her car's emergency lights as they were both trying to exit the South Bay Plaza parking lot in December.