Justice, at this point I don't think anyone is arguing about rather there was a conspiracy or not. At this point, many people had made up their minds either way on the subject and no one is changing it unless some very strong proof comes forth.
What I am personally arguing is that if Toya really believes in a conspiracy and she had proof, why didn't she take her information to the LAPD? She said so herself in her book that she done all this research, but didn't tell investigators because this is her private search. She didn't even bother to hire a PI. Quite frankly, all her facts in her book can be found by anyone using Google, so why do I have to pay 20 dollars to listen to what she had to say. Heck, she pretty much gave what her book was entirely about in her many interviews given less reason to buy it.
No one is force to buy her book, true. But, the fact that she is Michael's family gives her more credit than anyone. So for her to paint Michael as weak. crying for his daddy, and writing I hate so and so notes like a middle school girl is not flattering. So, you can understand why fans aren't happy with Toya. Especially when she can't even get her own story straight. The fact she is trying to sell what she knows too is very much what people been doing for years to Michael except it was to the tabs. And keep in mind, Toya sold stories to the tabs too not long after Michael died.
If Toya believes her brother was murder purposely, that is fine. If she was truly fighting for justice by doing real investigating, hiring a PI, and actually talking to the LAPD and the DA I would call her effects noble and I would support her. She done none of that. Which is why I personally don't like what she is doing.