Two teenage girls were arrested in northern California this week after they used sleeping-pill-laced milkshakes to drug one girl's parents because they wouldn't let her use the internet past 10pm.
The incident unfolded in Rocklin - 30 kilometres northeast of Sacramento - on the night of December 28. The parents fell asleep about an hour after drinking milkshakes their 16-year-old daughter and her 15-year-old friend brought them from a fast food restaurant, Police Lieutenant Lon Milka said.
The parents woke up in the middle of the night feeling "really groggy" with "hangover symptoms", Milka said, but they had not been drinking.
When they woke up the next morning they still felt "really odd", Milka said, and "figured that something was wrong".
The couple went to the Rocklin police station and picked up US$5 drug kits typically used by parents to test their children, Milka said.
After the tests picked up traces of drugs, the parents contacted authorities and took their daughter to the police station.
Investigators later learned that the girls crushed prescription sleeping pills and put them in the milkshakes so the parents would fall asleep and they could use the internet past the 10pm curfew.