LAHORE - PPP General Secretary Senator Jahangir Badr has demanded that the letter written by Mohtarma Benazir Bhutto Shaheed before coming to Pakistan, is an important document and the same should also be included in the investigation of her assassination. He said that murder of Benazir Bhutto was a conspiracy against the Federation of Pakistan, adding that the PPP government would not spare her killers. Badr was talking to media persons here on Friday outside Accountability Courts where he came for the hearing of two NAB references against him for making illegal assets. About the UNO reports on the murder of Benazir he said, PPP leadership including President Zardari and Prime Minister Gilani has no doubt about the authenticity of the investigation report. However, he added, the letter of Benazir should also be made part this report. PPP workers also gathered outside the Accountability Courts in view of Badrs arrival and staged a protest there, demanding early arrest of BBs killers. The accountability courts adjourned the hearing till May 25. In one reference Badr is accused of misusing his authority by illegally allowing various people to set up 61 filling stations of Pakistan State Oil (PSO). The NAB had filed this reference in 2002. Second reference was filed in 2003, accusing him of accumulating illegal assets disproportionate to his known sources of income during his stint as a federal minister. Earlier, he was acquitted from these references on March 10, 2008 under presidential pardon under, now annulled, National Reconciliation Ordinance (NRO).