SACRAMENTO, Calif. - Prosecutors say a Northern California couple accused of imprisoning their 13-year-old son for days by locking him in chains, often tethered to a kitchen table, has been charged with felony child endangerment.

Forty-one-year-old John Vang, the teen's father, and 34-year-old Thong Vue, the boy's stepmother, appeared for arraignment Monday in Sacramento Superior Court, but they didn't enter a plea. They will return to court Aug. 18.

The couple is free on bail. They wouldn't talk to reporters.

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