A March 19 residential fire at 1816 Legion Road killed two people and left investigators sifting for clues. The Chapel Hill Fire Department has labeled the cause of the blaze “undetermined.†A death investigation by the Chapel Hill Police Department is ongoing, pending autopsy results from the medical examiner’s office. Those with information about the cause of the fire or those who witnessed suspicious activity in the Legion Road area Friday night are encouraged to contact the Chapel Hill Fire Department.