Secret - S2.E6

A brain dead child is lying in the ICU and it's Hiyama's task to inform the mother and ask her to sign and give the okay to stop the machines. However, Hiyama gets too much involved (emotionally) and removes the breathing tube, causing the boy to die. The uncle of the boy is therefore talking to a lawyer. Aizawa talks to his father and has to get to know that his mother committed suicide because she didn't want to raise him anymore and Shiraishi learns that her father has lung cancer.