MULTAN,Dec 27th: Former Federal Law Minister Malik Mukhtar Ahmed Awan has disclosed that he had informed Benazir Bhutto that her younger brother Shah Nawaz Bhutto (27) was poisoned to death by Brig: Imtiaz Ahmed who was then head of Inter services Intelligence. Delivering his speech here on Sunday at a ceremony to commemorate the second death anniversary of Shaheed Benazir Bhutto.He said that Brig: Imtiaz gave poison to her Shah Nawaz Bhutto clandestinely but this allegation of murder was levelled on his wife Rehana because all available evidences were against her. According to him Brig: Imtiaz stayed in Nice (france) till Shah Nawaz's death.After the death of his brother , Mir Murtaza Bhutto divorced his wife who was sister of Rehana.Mukhtar Awan said ," I went to tell Benazir Bhutto about the murder of Shah Nawaz Bhutto but there was Aftab Sherpao sitting with her. Then I requested her to send him (Aftab) out of room so that I could disclose the name of the assassin.Upon this she gestured him to go out.The funeral of Shahnawaz turned into a defiant show of opposition to Zia's military rule. It was held in a Larkana sports stadium, attended by an estimated 25,000 people.Shahnawaz's daughter Sassi Bhutto lives with her mother in the United States.