Your argument reminds me of Speaker Nancy Pelosi’s argument that the impeachment of President Trump indicated he was guilty.
Can a comment like "If people are against the shooting then who is for the shooting" be far behind?
The shooter and his father are in jail awaiting trial. That will determine guilt or innocence. Isn't that how it's supposed to happen? Or should the local prosecutor and friend of the family be the one to decide they're innocent all on his own?