Caitlin Millar Hammaren

Caitlin Hammaren, 19, of Westtown, N.Y., was a sophomore majoring in international studies and French, according to officials at her former school district.

"She was just one of the most outstanding young individuals that I've had the privilege of working with in my 31 years as an educator," said John P. Latini, principal of Minisink Valley High School, where she graduated in 2005. "Caitlin was a leader among our students."

As a resident advisor, she was expected lead to lead by example. Students on her floor say she did much more.

"She's just one of those people who would do anything for you," said Rochelle Low, who lives in the same dorm suite as Hammaren. "She stayed up until 5 or 6 in the morning when she had an 8 o'clock class to help you no matter what."

An only child, she was her parents' pride and joy.