Jack Maple, a New York City police veteran who co-created the CBS series “The District,” died Aug. 4 in Manhattan following a battle with colon cancer. He was 48.Maple began his career by working as an NYC transit cop patrolling Times Square. He rose through the ranks, eventually being named New York deputy police commissioner in 1993. During his tenure, crime in Gotham plummeted 39%. In the 1990s, he created COMSTAT, computer-generated maps that spot crime trends. He was hired by cities such as Philadelphia and Baltimore as a consultant. In “The District,” Craig T. Nelson portrays Jack Mannion, a Washington, D.C., police commissioner based on Maple. He is survived by his wife, Brigid, and three children.