The Miller family is calling upon the Nova Scotia Serious Incident Response Team (SiRT) — the province’s independent police watchdog — to “explain its continued refusal to consider new evidence” of what happened to Clayton Miller.

Clayton Miller was only 17 when his lifeless body was found in a small brook in New Waterford, N.S., on May 6, 1990. The last time the teen had been seen alive was two days prior at a party that was raided by police.

The Millers have never accepted the answers provided to them by investigators or the conclusion reached by two separate reports: that Clayton’s death was an accident.