the most obvious reason i dont believe courtney killed kurt is because she didnt have to. there were numerous times he OD'ed and she saved his life, thats documented fact. why would she save his life only to kill him two months later? even if they were divorced she would have been set for life. that investigator never saw the crime scene or the evidence first hand. he's a hack whose livelihood depends on the myth of kurts murder, and his website looks like one of those sept 11th conspiracy blogs, everything cherry picked to support a pre determined conclusion.
it was evident in his music and his writing that he was enamored with suicide, he tried to kill himself numerous times. he bought the shotgun, he bought the shells. he wrote a fucking note. hell i swear he could have televised it live and people would still say courtney killed him.