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GILBERT, Arizona (KPNX) -- Arizona authorities say a grandmother visiting from Texas was arrested by Gilbert police on suspicion of child abuse after detectives said she enlisted her 9-year-old granddaughter in a drug-oriented plot to gain custody of the child.

SanJuanita "Janey'' Carbajal, 58, is accused of giving the girl cocaine and other drugs to plant in her father's pickup truck in hopes of framing him in a plot that police said is highly unusual.

"I haven't personally seen a case like this. It is truly unfortunate an adult is using a minor child to further her goal,'' said Lt. John Lyle, a Gilbert police spokesman. "Rather than creating specific harm, it's exposing the child to significant danger.''