Police in the US are studying a letter and stories written by the gunman who killed 32 people in Virginia. 23-year-old Cho Seung-Hui was being taught one to one at Virginia Tech after writing about attacking people with chainsaws.
Students sit on the grass of their team's football field watching the service on the scoreboard screen. According to his teachers the attacker wrote about attacks with a chainsaw and killing a teacher before the shooting.