Claire Davis, the 17-year-old who was shot in the head Dec. 13 by gunman Karl Pierson, has died.

Davis had been hospitalized in critical condition with severe head trauma, and friends, classmates and strangers attended vigils and made sure the #PrayForClaire hashtag was trending. The social media effort even led to boy band One Direction recording a 13-second get well video.

Littleton Adventist Hospital issued the following statement:

It is with heavy hearts that we share that a 4:29 p.m. this afternoon, Claire Davis passed away, with her family at her side. Despite the best efforts of our physicians and nursing staff, and Claire’s fighting spirit, her injuries were too severe and the most advanced medical treatments could not prevent this tragic loss of life. Claire’s death is immensely heartbreaking for our entire community, our staff and our families.

The Davis family would like to thank everyone who have sent their best wishes and prayers, and are grateful for the kindness and support of the community. They know that you all are mourning with them, and again request privacy during this time of grief.

Information regarding a public celebration of Claire’s life will be announced at a future date. Please feel free to continue to leave cards for the Davis family in the Cards for Claire box, located within the main entrance of the hospital.

Prayers are still with Claire Davis and her family tonight.

Editor’s note: This post has been updated with additional tweets.