and right on schedule, just about 6:30, 61-year-old johnny lee butts left his rural mississippi home,ut for his morning ritual, a four-mile walk. his neighbor, otis brooks, says butts, a sunday school teacher, waved as he passed his front door, wearing a blue t-shirt. let me ask you a dumb question. could you tell he was black? >> yeah, you could tell he was black. you could see his arm. >> reporter: nearly 7:00 a.m., an hour after sunrise, three white teenagers were barreling down panola county, mississippi highway 310 in a white monty carlo. two of the three teens admit they'd had been drinking vodka and smoking marijuana all night. they were headed towards johnny butts. the two passengers say they and the driver of the white monte carlo, 18-year-old matthew whitten darby spotted a man walking on the shoulder on the opposite side of the road. in statements to police and grand jury testimony obtained exclusively by cnn, the two teenagers who were with whitten darby, a then 15-year-old and an 18-year-old named tony hopper jr. describe what happened next. "we see a walker on the side o