A former Franklin County Detention Center guard is speaking out for the first time about the 2019 death of 21-year-old Dylan Stratton, saying he believes Stratton's death was preventable.DeAndre Johnson, who worked as a deputy jailer at the time, says he found Stratton unresponsive in his cell and performed CPR alongside a Frankfort police officer until medics arrivedJohnson says he raised concerns multiple times, to supervisors up the chain of …