DRIVING CHEVROLET CRUZ(2012) AND BRAKES FAILED CAUSING TO REAR END ANOTHER VEHICLE. CERTIFIED AUTO MECHANIC EXAMINED AND SAID FAILURE OF MASTER CYLINDER. CAR WAS TOWED DUE TO LACK OF BRAKES. OTHER DRIVER FILED A CLAIM AGAINST MY INSURANCE AND STATED INJURY SUFFERED. THUS OCCURRED ON INTERSTATE 460 W. ROANOKE COUNTY VA.