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The parents of a boy who pleaded no-contest to a 2014 Roswell school shooting have filed a lawsuit against New Mexico’s child welfare agency, claiming it violated the boy’s civil rights.

The Santa Fe New Mexican reports the lawsuit was filed in Santa Fe Tuesday, and it accuses the state-run Youth Diagnostic and Development Center, where Mason Campbell, who was 12 at the time of the shooting at Berrendo Middle School, has been held for the past three years.

The suit claims the facility has offered inadequate services and has denied the boy’s requests to speak with his parents.

Officials with the state Children, Youth and Families Department say they could not comment on the case.

The middle school gym shooting seriously injured two students, and Campbell was sentenced to detention up to the age of 21.