A Colorado woman who survived the Columbine High School shooting more than 25 years ago has died, following a battle with cancer. 

Karissa Rund, 40, who was known for “her resiliency, bravery, dedication and abiding service to God,” succumbed to colorectal cancer on March 3, according to a GoFundMe page and her obituary. 

“Karissa was a Columbine shooting survivor, war widow, battled stage 4 cancer for 10 years, and the biggest encourager most of us have ever known. Her mission of service to people, proclaiming the hope of God despite pain and suffering, and being a light despite darkness – this legacy has changed her corner of the world. Her presence in this world was a gift,” read a statement on a GoFundMe page set up for her husband, Doug Rund. 

“Doug, day-in and day-out, selflessly and unwaveringly served Karissa in her sickness,” the statement added. “He tenderly and attentively cared for her every need, noticing the little details, knowing just how she wanted/liked things.” 

A visitor places a candle among flowers at the Columbine Memorial at Clement Park in Littleton, Colorado, during a community vigil for the 20th anniversary of the high school mass shooting, on April 19, 2019. (Jason Connolly/AFP/Getty Images)

Rund’s obituary describes her as having a “storied career in civil service working as a speechwriter and public affairs specialist for the Department of Energy, the Federal Emergency Management Agency, and finally the Department of Homeland Security.” 

“She medically retired when she was no longer able to keep up with the rigors of career civil service and started a nonprofit ministry to aid, inspire, and doula all suffering people. Her ministry touched many people across the country and was a project she pursued until she was physically unable,” the obituary continued. 

Police officers sit in the parking lot next to Columbine High School on April 20, 2021, in Littleton, Colorado. Twelve students and a teacher were killed in the Columbine High School shooting, which at the time was the deadliest school shooting in U.S. history. (Michael Ciaglo/Getty Images)

“Karissa was an abiding servant to God,” the obituary added. “She was a force of friendship in this world, a lover of adventure, and a delighter in the victories of all those around her.”