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AUGUSTA, Maine (AP) _ A former state adoption caseworker was sentenced Thursday to 20 years in prison for the asphyxiation death of her 5-year-old foster daughter, who died bound with duct tape.

The sentencing of Sally Ann Schofield, 41, closes a chapter on a criminal case that led to legislative investigations into the state's child welfare system.

Prosecutors said Schofield, a former adoption caseworker for the Maine Department of Human Services, used the duct tape during a disciplinary ``time out'' after the child woke up from a nap in a rage on Jan. 31, 2001.

The child, Logan Marr, died from asphyxiation in the basement after being bound to a highchair with 42 feet of duct tape.