He was walking home from the store, where he purchased Arizona Watermelon and Skittles, two ingredients added to Robitussin to make a concoction that gets you high. It's called "Lean" or "Purple Drank". He had a history of burglary, truancy, and his mother sent him to stay with his father because she couldn't handle his attitude and his growing list of troubles. Also, his text messages were published (look it up on Google) and its all about him trying to score drugs. He was no innocent "child".