(Long Prairie, MN)  --  The son of former Minnesota Viking Barry Bennett and his wife Carol is wanted on second-degree murder charges in their deaths.  Todd County authorities say 22-year-old Dylan Bennett shot his parents Monday near Long Prairie and then drove his mom's vehicle to Ohio where he boarded a flight to Cancun, Mexico.  Deputies found nine millimeter shell casings and an empty handgun magazine at the scene.  Police say Bennett gave someone in Columbus, Ohio his gun.  The criminal complaint says Barry Bennett had reported last December that his son had "expressed homicidal thoughts about killing his parents" while in a mental health treatment facility.