Joshua Nareau eulogized his murdered grandfather after he was shot and killed in front of his home in Port Charlotte, Florida, on December 28. But on Thursday, the Charlotte County Sheriff’s Office arrested Nareau, 23, and charged him with James Khoury’s murder. The 71-year-old Khoury’s wife, Lynda Khoury, called 911 just after 5 a.m. that …