Investigators are delving into the digital footprint of a 14-year-old boy accused of a deadly shooting at Debsirin Nonthaburi School, after discovering that he had searched for details about a U.S. school shooting and played violent video games in the days leading up to the attack.Police have not yet determined a definitive motive, but they are examining whether the teenager's online activity or personal circumstances played a role in the violence that also claimed the lives of his grandparents....
