HARTFORD, Conn. (AP) _ A 4-year-old boy arrived at his day care center with 20 packets of heroin stuffed into his coat pocket, police said.

The boy handed the drugs to a worker at the Growing Tree Early Learning Center on Monday morning, telling her he didn't want them anymore.

The packets were not opened, and no other children at the center were exposed to them, police said. The packets were labeled ``overdose.''

The boy's mother, postal worker Maureen DaCosta of Hartford, was charged with risk of injury to a minor.

DaCosta said she was just as surprised as the police and workers at the day-care center.

``I'm not crazy enough to let my son get into drugs. It's too scary,'' said DaCosta, who was released on bail Tuesday after appearing in Hartford Superior Court. ``I don't know where my son got it.''

Police were testing fingerprints on the packets Tuesday.