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Ann Kechter talks with the media as her husband, Joe, looks on in Littleton, Colo., April 8, 2000. The Kechters' son, Matthew, was slain in the Columbine High School massacre April 20, 1999.
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Michael Shoels, father of slain Columbine High School student Isaiah Shoels, leans on his son's headstone while Martin Luther King III, second from left, offers a moment of silent prayer, in Denver, April 20, 2000. The memorial was held as part of the one-year anniversary of the Columbine killings.
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Darrell Scott, center, the father of slain Columbine student Rachel Scott, talks to the media during a news conference in Littleton, Colo., April 8, 2000. Behind him are, from left, Brad and Misty Bernal, parents of Cassie Bernal, Ann and Joe Kechter, the parents of Matthew Kechter.
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Lisa Rohrbough, left, and Sue Petrone, play with Issac Nicholas, 1, as they get him ready for bed Sept 24, 2003, in Jefferson County, near Conifer, Colo. Adopted children are bringing tears of joy to the homes of four families who lost children in the Columbine High School massacre. Brian and Lisa Rohrbough adopted two Ukrainian infants.
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Patricia DePooter, whose son, Corey, was killed in the Columbine High School massacre talks to the media at the Jefferson County Fairgrounds in Lakewood, Colo., Feb. 25, 2004, after viewing evidence from the Columbine High School shooting. Family members of victims were permitted to look over evidence for the first time.
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Joe Kechter, whose son, Matt, was killed in the Columbine High School massacre, talks to the media at the Jefferson County Fairgrounds in Lakewood, Colo., Feb. 25, 2004.
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Sue Petrone, left, and Dawn Anna, mothers who lost children in the shootings at Columbine High School, listen to a speaker during the Governor's Columbine Review Commission, in this Oct. 2, 2000, file photo in Golden, Colo.
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Misty Bernall talks about her daughter, Cassie, as her husband, Bud, listens during an interview in Littleton, Colo., Sept. 11, 1999. The Bernalls wrote a book, "She Said Yes: The Unlikely Martyrdom of Cassie Bernall." Cassie was killed in the April 20 massacre at Columbine High School after one of the gunman asked her if she believed in God.
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Members of the Columbine High School volleyball team hug the parents of Lauren Townsend after funeral services for Townsend in Littleton, Colo., April 26, 1999. Townsend was killed during the shooting rampage at the school.
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Tom Mauser holds up a pair of shoes belonging to his late son, Daniel, who was killed in the Columbine High School shootings, during a rally at the Capitol in Denver, April 11, 2000. Mauser placed the shoes with more than 4,000 other pairs, representing children killed by handguns in one year.
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Angela Sanders, center, the daughter of slain Columbine teacher Dave Sanders, speaks during a news conference as her attorneys Saul Singer, left, and Peter Grenier look on, Aug. 20, 2002, in Denver. Sanders reached a $1.5 million settlement in her lawsuit against the Jefferson County sheriff's office, saying the department has finally been held accountable for failing to rescue her father, who bled to death in 1999 while trapped inside the school waiting for help to arrive.
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Bob Curnow, facing camera, who lost his son in the massacre at Columbine High School, hugs Sue Townsend, back to camera, after a news conference April 7, 2003, in Littleton, Colo., held to unveil plans for a memorial for the 13 victims of the school shooting.
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Michael Shoels, left, and Vonda Shoels, middle, the parents of slain Columbine High School student Isaiah Shoels, are escorted into the Heritage Christian Center in Denver, April 29, 1999, by LaQuitia Taylor, right, for Isaiah's funeral.
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Tom Mauser, center, father of one of the students killed in the massacre in Columbine High School, joins David Winkler, left, and Ben Gelt, right, leaders of a student group called SAFE Colorado, at a news conference July 30, 1999, west of Littleton, Colo., at which the trio asked members of Congress to include gun-control measures in juvenile justice legislation.
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Columbine High School parents Brian Rohrbough and Dawn Anna embrace as they arrive at the Jefferson County Fairgrounds in Lakewood, Colo., Feb. 25, 2004, to view evidence from the Columbine High School shooting.
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Dawn Anna, the mother of slain Columbine High School student Lauren Townsend, clings to her husband Bruce Beck during a news conference in Littleton, Colo., April 8, 2000.