Yangon: A human rights lawyer says a report by Myanmar's government alleging the involvement of a former army officer in the assassination of a top legal adviser to the ruling National League for Democracy party raises new questions about the slaying. Robert San Aung said Thursday that the failure to explain a motive for the Jan. 29 shooting of Ko Ni had raised suspicion among the public, especially because the new suspect is a former lieutenant colonel, suggesting possible military collusion. He also questioned how the plotters were able to acquire two pistols for the gunman, when gun ownership by civilians is rare.