Two Northern California teenage girls are accused of spiking milkshakes with prescription sleeping medicine to knock out the parents as part of an alleged conspiracy to skirt the family's ban on home Internet use after 10 p.m., according to police.

The incident happened on the evening of Dec. 28 in Rocklin, Calif., a city of about 60,000 people approximately 21 miles northeast of Sacramento.
 
"The 16-year-old daughter and her (15-year-old) friend were at a house in Rocklin and they say, 'hey mom and dad, how about we get you some milkshakes?' They go to a local fast food restaurant and get some milkshakes," Rocklin Police Department Lt. Lon Milka said Thursday.  The teens then allegedly spiked the shakes with some sort of anti-anxiety medicine, Milka said.

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