Graham has served in the Senate since 2003 and is a close ally of President Donald Trump, despite being widely regarded as one of the most neoconservative foreign policy hawks and a stalwart of the old guard GOP.
Anthony was convicted by the jury in Collin County earlier Tuesday after a week-long trial. The jury determined that Anthony fatally stabbed Metcalf at a track meet in Frisco, Texas. He faced up to life in prison.
The pilot, who retired last year before the investigation, held some valid flight credentials, officials said, but not the one required to be a captain.