What happened to Hassan and his wife?

A month after he had arrived in Peshawar, he received news of Hassan's death from a friend. After he left Kabul, word spread that a Hazara family was living alone in Baba's house. One day, the Taliban came to the house and demanded that they leave. When Hassan protested, they took him out to the street, forced him to kneel, and shot him in the back of his head. Farzana ran out screaming and they shot her dead as well. The news devastated Amir, who could only whisper, "No. No. No."

Hassan had a wife and a son, named Sohrab, and had returned to Baba's house as a caretaker at Rahim Khan's request. One day the Taliban ordered him to give it up and leave, but he refused, and was murdered, along with his wife.