Claire Davis

Arapahoe County Sheriff Grayson Robinson holds a picture of Claire Davis, the 17-year-old student who was shot at a Colorado high school Friday. She remained in critical condition Saturday. (Ed Andrieski / Associated Press / December 14, 2013)

In one photo Claire Davis wears a riding cap, nuzzling a horse. Diffused sunlight illuminates green grass and a white picket fence.

Now the high school senior lies in a hospital room. Outside, a community prays that she will survive a gunshot wound to the head.

Police identified Davis, 17, as the student who was shot Friday at Arapahoe High School in Centennial, Colo. She remained in critical condition Saturday, hospital officials said.

She was the lone victim of Karl Halverson Pierson, 18, who entered the school looking for a librarian, officials said. On his way to the library, he shot Davis in a hallway, point blank. 

At a news conference Saturday in Centennial, Arapahoe County Sheriff Grayson Robinson read a statement from her family: “Our beautiful daughter Claire Davis has severe head trauma as the result of a gunshot wound. She needs your continued prayers."

Davis' Facebook profile shows a girl who loves horses. She was a member of a riding school, and smiles and looks affectionately at a horse in photos. In the statement from family members, they thanked not only friends but also "the equestrian community for their outpouring of love and support."

Robinson said Saturday that Davis and Pierson did not interact in the hallway prior to the shooting. She did not appear to have been targeted.

“Claire Davis is a young woman of principle, she’s a young woman of purpose, she’s an innocent young lady and she was an innocent victim of an evil act of violence,” Robinson said.

After shooting Davis, Pierson went to the library and fired another shot, then ignited one of three Molotov cocktails he had brought with him, Robinson said.

At the high school, flowers were inserted into openings in a chain-link fence to form the message "4 CLAIRE."

Twitter users shared positive thoughts with the hashtag #PrayForClaire.

Friends and family gathered outside to hold a vigil for Davis on Saturday evening, where they held candles in the cold Colorado winter and prayed for her survival. 

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Twitter: @skarlamangla

soumya.karlamangla@latimes.com