Methamphetamine found in Halloween candy bag Troubling ... Parents found crystal meth in their daughter's Halloween candy. Picture: Supplied Source: Getty Images POLICE in northern California are investigating who gave a plastic bag of methamphetamine to a young girl on Halloween. Hercules police Sergeant Ezra Tafesse told the Contra Costa Times the eight-year-old girl's parents found the powder packaged in a small zip-style bag among the child's Halloween candy and alerted police. OFFENSIVE: MH370 and MH17 themed Halloween costumes deemed insensitive IN THE SPIRIT: It's time Australia embraced its dark side and stopped hating Halloween Be vigilant ... Police are warning parents to inspect their child's candy before they let them eat it. Picture:AP/Chris O'Meara Source: AP Tafesse says the girl had been trick-or-treating in the Promenade area of Hercules, a San Francisco Bay Area city, when she was given the bag containing one-tenth of a gram of crystal methamphetamine. He says it's not clear if the girl was given the drugs intentionally or accidentally, and police don't have a suspect. "More than anything, we want to educate the public to inspect their children's candy before giving it to them," Tafesse said. Tafesse says drugs are slipped into Halloween candy from time to time, but it's usually marijuana. Hercules police are encouraging anyone who finds illegal drugs in their children's candy to contact them.