They've declared it fake news and forced several media outlets to remove articles stating it. They've not really presented any evidence that is true, except to proclaim that the shooter was the maternal mother of the child. No one will be able to confirm this and now days, they might call the maternal father a maternal mother, if they identified as such. The child was shot in the head, while essentially used as a human shield, so the child won't be telling....

The shooter did have a long history of schizophrenia and at least one forced mental health hospitalization, though.