Relatives of Virginia Tech victims are asking the state to reopen its investigation of the 2007 mass shootings at the school.

A group including parents of many of the 32 people killed by student gunman Seung-Hui Cho issued a statement Tuesday calling on Gov. Tim Kaine to reopen a state panel's review. The group also includes people hurt in the shooting.

The statement follows disclosure last week that the former director of the university's counseling center found missing mental health records for Cho at his home.

Cho committed suicide after killing students and faculty members in a dormitory and classroom building on April 16, 2007, the worst mass shootings in modern U.S. history.