Some of Cho's family members expressed sympathy for the victims' families and described his history of mental and behavioral problems. Cho's maternal grandfather was quoted in the "Daily Mirror" referring to Cho as a person who deserved to die with the victims. On April 20, Cho's family issued a statement of grief and apology, written by his sister, Sun-Kyung Cho, a 2004 graduate of Princeton University who was employed as a contractor for a State Department office. In it, she stated: