By Daniel Bates Cowboys cornerback Kelvin Joseph has been participating in Dallas’ offseason program, but his future in Dallas hangs in the balance. And it has nothing to do with football. Joseph recently spoke to police about his involvement as a passenger in a drive-by shooting that ended up killing a man. However, even if he didn’t pull the trigger, he could still face penalty under Texas state law. Quarterback Dak Prescott was asked about his Cowboys teammate over the weekend; telling reporters he’ll continue to be a brother and teammate to Joseph while everything gets sorted out. “He’s be…