The 7-year-old reported that someone had dropped something into the child's bag Friday night, while the boy was out trick-or-treating with his sister.
His parents say they found a bag of meth along with $85 mixed in among the Snickers bars and Skittles. The parents called police, who confirmed that the substance was methamphetamine, worth up to $200 on the street.
The boy's mom said the clear crystals looked like rock candy, and the kids "could have OD'd on it."
Police in the town of Ramsey, northwest of Minneapolis, say they believe the young man was a suspect fleeing police after a report of an assault in the area.