A portion of the diaries of Gavin Long, provided by his mother, Corine Woodley, are seen during an interview with PBS talk show host Tavis Smiley in Los Angeles, Thursday, July 21, 2016. Woodley brought two diaries that she said her troubled son wrote, one in 2014 and one in 2015, about the African-American history of slavery and oppression. Police gunned down Long, a 29-year-old from Kansas City, Mo., after he shot and killed three officers  and wounded several others during a shootout Sunday.