Milka said that on Friday evening, a 15-year-old girl – who had a 16-year-old friend from Roseville visiting – offered to pick up milkshakes from a local fast-food restaurant for her parents.
The parents drank about a quarter of the milkshakes but didn't finish them, saying they tasted funny and were grainy, Milka said.
But the shakes – loaded with prescription sleep aids allegedly provided by the friend – were effective, and the parents quickly fell asleep.
They awoke at 1 a.m. with unexplained hangover symptoms, but went back to sleep. In the morning, with the headache and grogginess still present, they went to the Rocklin police station to pick up a drug test kit, Milka said.