Claire Davis , the 17-year-old high school senior shot by a classmate at their Colorado school , died Saturday at the hospital where she was being treated . `` It is with unspeakable sadness that we write and say that Claire has passed away from the gunshot wound she received at Arapahoe High School on December 13 , '' her family said in a statement posted on the Facebook account of Littleton Adventist Hospital . `` Although we have lost our precious daughter , we will always be grateful for the indelible journey she took us on over the last 17 years -- we were truly blessed to be Claire 's parents . The grace , laughter and light she brought to this world will not be extinguished by her death ; to the contrary , it will only get stronger . '' Davis was killed after Karl Pierson , 18 , according to police , walked into Arapahoe High School armed with a pump-action shotgun , a machete and a backpack containing three Molotov cocktails , a bandolier of ammunition across his chest . He shot Davis once in the head and fired randomly into school hallways . Police said Pierson was looking for revenge against a librarian , but could n't find the faculty member and killed himself as a school resource officer closed in . Davis did not know Pierson and was just a random victim , police surmised . She had been in a coma since the shooting . Davis was described as a sweet girl who loved horses and the English boy band One Direction . After friends started a Twitter campaign , the band recorded a 13-second video message and sent it directly to the Davis family , a source close to One Direction told CNN on Thursday . The video shows singer Liam Payne delivering the message as the other four members stand by . The hospital said Davis died at 4:29 p.m . The family 's message on Facebook thanked the hospital staff , first responders and law enforcement officers . `` Last week was truly a paradox in that we lost our daughter , yet we witnessed the wonderful love that exists in the world through the tremendous outpouring of support we received , '' the family said . Pierson 's parents issued a statement last week . `` We can not begin to understand why Karl did what he did , '' Barbara and Mark Pierson said . They also offered prayers `` for the entire Arapahoe High School community , as we know your lives are forever changed by this horrific event . '' Hundreds of people attended a vigil for Davis last Saturday . The shooting happened about 10 miles from where Eric Harris and Dylan Klebold killed 12 students and one teacher in a rampage at Columbine High School in April 1999 before killing themselves .
Parents of Claire Davis announce her death `` with unspeakable sadness '' High school senior was shot December 13 by a classmate , who then killed himself . Karl Pierson had been seeking revenge against a librarian , police say .