"What do we know about the alleged gunman?
His precise motives remain unclear.
But there are suggestions the fourth-year student had developed a hostile attitude to the college.
Russia's RBC TV interviewed a friend who said Roslyakov "hated the technical school very much" and had vowed "revenge" on his teachers.
He had recently been given a permit for hunting weapons, Crimea's ombudsman for the rights of the child, Irina Klyueva, said.
Classmates also say that he was very self-contained, hardly communicated with anyone, and had long ago stopped using social networks."
Source:
https://www.bbc.com/news/world-europe-45891201