His son’s killer was never charged. Now, Armando Rodriguez is asking for a meeting with the Bexar County District Attorney’s Office to have his son’s case looked at by a different attorney.In November 2020, Robert Fluellen was shot and killed in what the Helotes Police Department called a “criminal negligent homicide case,” according to their police report made available to KSAT through an open records request.“I’m my son’s voice. I’m all that’s…