The trial of an Islamic State militant group (ISIS) member in northern Iraq has revealed more about the brutal crimes the jihadist group committed against the Yazidi minority sect.

The suspect, 40-year-old Mohammed Ahmed, testified before the Nineveh investigations court located south of Mosul, the only such arena in northern Iraq where judges can try extremism cases. His horrifying account of the acts he perpetrated while a member of the group was detailed in depth by Britain’s Telegraph newspaper, which obtained rare access to the court proceedings.

His charges are grim and numerous: four instances of kidnapping and rape, and 10 murders. His victims? Yazidi women, and men and boys belonging to the sect, respectively.

In his address to Judge Arif, the suspect admitted the series of crimes that were committed after ISIS fighters overran the Yazidi-majority region of Sinjar in mid-2014.

“I shot them there in the school hall,” he told the judge. “I think I killed 10 or 12 of them, including some children.”

The account aligns with reports from Sinjar at the time: mass executions of Yazidi men and boys. But not the women: ISIS fighters instead kidnapped them, keeping many captive and holding them as sex slaves.

Ahmed admitted that he took part in the kidnap of Yazidi women, excusing his actions by saying he was following the orders of his ISIS leader. Upon taking the women back to the northern Iraqi city of Mosul, the largest city the group has controlled since its rise to prominence in 2014, he brought them into the grips of ISIS slavery.