Two Daegu Teenagers Murder Their Grandmother

This is a horrible story:

Police on Monday arrested two teenage brothers for allegedly stabbing their own grandmother to death.  
   
According to Daegu Seobu Police, an 18-year-old boy stabbed his 77-year-old grandmother with a kitchen knife around 12:50 a.m. on Monday at their house in Daegu.  
   
Stab wounds were found all over her body, including on her face, shoulder, arm and hip.  
   
When the police asked for his motive, the boy said that he was angered by his grandmother’s nagging. 

Joong Ang Ilbo

You can read more at the link, but the murderers 16 year old brother later admitted to helping kill his grandmother as well.