I won't go so far as to call someone a criminal without an investigation and conviction, but I will say when something deserves an investigation. And the tweets that I have seen warrant such.
At the very least we should all care enough to be praying for children who are in harms way, where ever that may be, and that justice for those children be served.
Then, call the FBI: https://www.fbi.gov/contact-us
See how far you get before they escort you to the exit.
Otherwise, stop slandering someone simply because you don't like them.