Myon Burrell was 16 when he was arrested in connection to the fatal shooting of an 11-year-old girl in Minneapolis.
Hardel Sherrell's mother has continued to push for her son's death to be reviewed.
The victim's body was found outside a dog park last weekend.
The victim was thrown overboard when his boat hit a wake.
The drugs have been targeted by police for their role in the ongoing opioid crisis.