David Simon is Baltimore’s best-known chronicler of life on the hard streets. He worked for The Baltimore Sun city desk for a dozen years, wrote “Homicide: A Year on the Killing Streets” (1991) and with former homicide detective Ed Burns co-wrote “THE CORNER: A YEAR IN THE LIFE OF AN INNER-CITY NEIGHBORHOOD”1 (1997), which Simon adapted into an HBO miniseries. He is the creator, executive producer and head writer of the HBO television series “The Wire” (2002–2008). Simon is a member of The Marshall Project’s advisory board. He spoke with Bill Keller on Tuesday.