Police in the northern province of Hai Duong on Wednesday said they are investigating a 16-year-old girl suspected of killing her half brother.
The girl reportedly confessed that she hit the 10-year-old boy with a brick on Sunday (May 22) when they were walking home.
She said she had been caught by the brother stealing some money from their parents. He had threatened to tell the parents about this, she said.
When she realized that her brother was dead, she pushed his body into a dam.
The parents reported that their son was missing later the same day. The girl admitted to the crime the next morning when investigators found the boy's slippers and the brick. They then recovered his body.
The girl lives with her father and his second wife. The couple also has another son.
Neighbors said it was a very happy family.