The father of a baby whom authorities suspect died after being violently shaken has been arrested on a murder charge. Twenty-one-year-old Casey Chatwood of Marianna was arrested on a first-degree murder charge after his seven-month-old son died Monday at LeBonheur Children`s Hospital in Memphis, Tennessee. Marianna police say they got a call Saturday from Chatwood, saying something was wrong with his child. The baby was taken to a hospital in Forrest City, then transferred to the hospital in Memphis. Police say they suspect the baby`s death was related to shaken baby syndrome.