how is that who is lying who is truth ….
i think it is impossible because i think you are saying A is half [he is not the murderer but he knows meaning first statement true, second false] ‘b’ complete truth [did not kill him and not there] and ‘d’ is the murderer [because whoever is the liar is the murderer]
But what about c? we only have a half left meaning that a is there. [second statement will be false]?
this is not the answer