Tennessee authorities say the parents of a five-year-old non-verbal autistic boy are responsible for his death.

Investigators with the Tennessee Bureau of Investigation say the parents of Joe Clyde Daniels reported him missing earlier in April. Two days after the report, authorities opened a criminal case against the father, Joseph Daniels.

TBI agents say they eventually discovered Joseph Daniels intentionally killed his son and hid his body. He was arrested Saturday and charged with criminal homicide.

Agents announced Monday the mother, Krystal Nicole Daniels was also arrested and charged with aggravated child neglect.

Both are in the Dickson County, Tennesse jail on a $1 million bond.