AnthonyA. Mattison, 35, of Osceola, has been charged with first degree murder, use of a firearm to commit a felony, possession of a firearm by a prohibited person and improper disposal of human skeletal remains, in the case involving the death of 25-year-old Jasmine Garnett of Columbus. It is alleged he killed Garnett and dumped her remains in Clay County, where he is being prosecuted.George…