I think PML-Q is responsible for her murder because Q-league is Qaatil league as quoted by Mr. Zardari in his today's press conference,actually Chaudhry brothers never wanted to see Nawaz Sharif and Benazir come back to Pakistan because they knew that they will not be able to control the over whelming response of people towards them and their(Chaudhry brothers) polictical suvival will be in danger.