Watch history found on student’s computer after Debsirin school attack

On 7 August 2026, police uncovered a concerning discovery during their investigation of the Debsirin Nonthaburi School shooting. After responding to a tragic incident where two individuals were found dead in a house in Bang Bua Thong district, the authorities discovered a 73-year-old man and his 74-year-old wife, both fatally shot in the kitchen. The victims were the grandparents of the 15-year-old student who allegedly carried out the shooting at Debsirin Nonthaburi School.

Further examination of the slain student's desktop computer revealed an unsettling watch history on YouTube. The student had viewed videos related to school shootings and mass shooters, as well as accessed Roblox links concerning firearm handling. These disturbing videos had been accessed as recently as 30 July, more than a week prior to the harrowing events at Debsirin School.

During the police search of the family home, investigators also uncovered the student's possession of his grandfather's 9mm handgun. This weapon was used in the brutal attack, where the teenager took the life of his own grandparents before embarking on a deadly spree at the school. Several individuals were killed and injured during the violent episode that unfolded early on Friday morning.