ROCHESTER — An Austin child is breathing without a ventilator one week after a hit-and-run crash sent him into a coma. On May 27, a driver hit 11-year-old Tristen Ringlen as the child crossed the street in the 1300 block of Fourth Avenue Southeast in Austin. First responders said the child was unresponsive immediately following the crash. He was flown to Mayo Clinic Hospital - Saint Marys, where doctors continue to treat his brain injuries. A 17…