"We tried to get the warning out last year," said Ryan Petty, whose daughter Alaina was killed at Parkland. He was worried survivors would take their own lives – just like some of those at Columbine High School did. Thirteen people were murdered in that 1999 shooting in Colorado.
"Almost as many people died after Columbine as died during the event, and that was suicide," Petty said.
October 22, 1999 -- Carla June Hochhalter (pictured), mother of surviving victim Anne Marie Hochhalter went into an Englewood pawn shop, bought a gun and shot herself there in the shop. She had been diagnosed with depression before the shootings and the stress of having a daughter paralyzed by the attack on Columbine pushed her over the edge.
February 13, 2000 -- Nicholas Kunselman, 15, and Stephanie Hart, 16, - both students at Columbine - were killed late Sunday night at a Subway restaurant two blocks south of Columbine High School. Nicholas was supposed to lock up the store; Stephanie was there to give him a ride home.
February 14, 2000 -- The bodies of Nicholas Kunselman and Stephanie Hart were discovered at the Subway restaurant around 1:30 AM (Valentine's Day) by another Subway employee who noticed the lights were still on when she drove by. Victim Rachel Scott worked at the shop before she was killed at the school.
May 4, 2000 -- Greg Barnes, a Columbine High student in his Junior year and a basketball player for the school team, died by suicide (by hanging himself) two weeks after the first "anniversary" of the shootings. He was in the school on April 20, 1999 and escaped without injury, though he saw Coach Dave Sanders die and victim Matthew Kechter was a close friend of his. His father found Greg's body in the garage at 12:15 PM with a CD repeating one song over and over: Adam's Song by Blink 182. He left no note but it is believed the suicide was prompted by a recent break-up with his girlfriend. His death left his family and fellow students at Columbine stunned.