OMAHA, Neb. (AP) — A judge has dismissed a lawsuit filed against the state by the estate of an Omaha boy strangled by his mother.

Angela Manns admitted strangling her 12-year-old son, Michael Belitz, while he slept on Aug. 11, 2009. His decomposing body was found in a bathtub. Manns was sentenced to 34 to 35 years in prison.

Judge Mark Ashford in October last year granted a request by the state’s lawyers to dismiss the case, saying the state had established no “special relationship” with the boy to protect him from his mother.

The lawsuit by his estate said state officials failed to act on repeated warnings from the boy’s mother and other family members about his welfare.

The estate’s attorney didn’t immediately return a call Friday from The Associated Press.