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CUSHING, Oklahoma -- The death of a autistic boy in Cushing is ruled accidental.

According to District Attorney Tom Lee and Cushing Chief of Police Terry Brannan, criminal charges will not be filed as a result of the death of 4-year-old Blake Murrell.

Murrell drowned in a pond within Memorial Park in Cushing on April 19. His body was found hours after he was reported missing from the family's home nearby.

The D.A.'s office says a thorough investigation was conducted by the Cushing Police Department, the Department of Human Services and the State Medical Examiner's Office. A statement released by Lee's office states "the evidence gathered does not justify the filing of criminal charges. The evidence indicates this was an unfortunate, tragic accident."