The drugs arrived in an “unnamed, unmarked package,” recalls Timothy LaMere. The rest of what happened that night is more of a blur. After sharing the 2C-E — a synthetic imitation of the rave drug ecstasy — with friends at a house party in Blaine, Minn., things started to go very wrong. Those who took the drug became dangerously unwell — sweating, shaking, rolling around on the floor and experiencing seizures and severe pain. LaMere was among 10 people hospitalized, while one friend, 19-year-old Trevor Robinson, father of a 5-month-old baby, died after “punching walls, breaking items, staring and having dilated pupils and yelling,” according to the criminal complaint. LaMere is currently serving a 10-year sentence for third-degree unintentional murder in a state correctional facility. “I feel horrible. I feel horrible for Trevor’s family — I was close to his mum before — and I feel horrible for anyone who knew him,” he tells TIME.