Toronto Police were not responsible for the death of a 22-year-old man at the Veld Music Festival in early August, according to the Special Investigation Unit.

“The evidence indicates the man’s death had nothing to do with the conduct of the police, who had a very brief interaction with him on that day,” the SIU news release stated Thursday afternoon. “Rather his death resulted from a combination of myocardial infarction and renal failure brought about by the ingestion of a combination of illicit drugs.”

Willard Amurao attended the two day music festival in Downsview Park on Aug. 3 and 4, the SIU said. On Aug. 4, he went into medical distress and was helped to an emergency area by two men.

Amurao began convulsing and “flailing violently,” and could not be treated by paramedics. A police officer handcuffed both of Amurao’s hands to the side rails of the stretcher so he could be treated, the SIU said. One of the handcuffs was later removed so IV medication could be administered.

While in the ambulance the man went into cardiac arrest, and the other handcuff was removed. Amurao lost vital signs and could not be revived, the SIU said.

The SIU assigned five investigators and two forensic investigators to the case. The file has now been closed.

A 20-year-old woman, Annie Truong-Le, also died at the festival after ingesting “party drugs,” and 13 others were taken to the hospital. Everyone who became ill at Veld had consumed one of the two mystery drugs being offered around at the event, Toronto Police said, adding one was small brown pill, the other a clear capsule filled with a white substance.

The SIU is provincial civilian agency that investigates any circumstances involving police and a death, serious injury or allegations of sexual assault.