Parents of a Nacogdoches boy are under investigation after police say their son threatened to kill two girls. Police said that a 10-year-old boy stole a gun from his parents just after two this afternoon. He then went to a house on Looneyville and showed two teenage girls the gun and threatened to shoot them. Officers were called to the scene and the gun was apprehended. The girls were not hurt. Charges won't be filed on the boy because of his age. But there will be an investigation to determine if charges will be filed on the parents.