Denver (AP) Statements from the parents of two teenage gunmen who attacked Columbine High School will remain sealed for 20 years.
The ruling by U.S. District Judge Lewis T. Babcock also prohibits a school violence expert and his assistants from reviewing the documents.
The ruling frustrated at least one victim's family. Brian Rohrbough says he disagrees with Babcock's belief that the documents' release could lead to copycat crimes.
Rohrbough's son Daniel was one of 12 students killed April 20, 1999 by Dylan Harris and Eric Klebold. A teacher was also killed and the two gunmen committed suicide.
Rohrbough says knowing what was happening in the homes of the gunmen is important to learn how to prevent a similar tragedy from happening again.