 Like Eric Harris, Roslyakov committed suicide in the library of the college, by shooting himself with his shotgun.Investigators in the days after the attack attempted to establish Roslyakov's motive and suggested that they were treating it as a school shooting.Officials are investigating concerns in the case, such as where Roslyakov got the 30,000–40,000 rubles (about $450–600 USD) for the weapon, and where he learned to use those weapons.