Khamrab was a drug addict since high school; in January, he had been arrested for possessing methamphetamine.[1] Khamrab was dismissed from the police force in either 2021[29] or June 2022[30] as a result of his addiction. Earlier on 6 October 2022, the day of the attack, Khamrab attended a court hearing regarding his drug offences,[15] and was scheduled to appear for a court hearing on Friday 7 October, in connection with his offences.[30]