A student killed in an overnight shooting at Northern Arizona University graduated from Castle View High School in 2013, officials said Friday.

Randy Barber, spokesman for Douglas County schools, confirmed that Colin Brough was a student at the Castle Rock high school. A crisis team has been activated to provide any support for students and staff.

“Following student deaths, we always activate this team,” Barber said.

Castle View High School student government tweeted their condolences.

“We are saddened to hear the loss of 2013 alum from Castle View, Colin Brough,” the tweet read. “Please keep the Brough family in your thoughts and prayers.”

Brough was killed in an overnight confrontation between two groups of students at the university in Flagstaff, Ariz.

PHOTOS: See a gallery of photos from the Arizona campus shooting.

University police chief Gregory T. Fowler identified the shooter as 18-year-old Steven Jones and said he used a handgun in the shootings at about 1:20 a.m. Friday.

Jones was charged with first-degree murder and three counts of aggravated assault, according to a Northern Arizona University news update at noon.

Jones is scheduled for an initial appearance in front of a magistrate on Friday afternoon.

The university in a statement identified Brough as the student who died. The victims being treated at Flagstaff Medical Center are Nicholas Prato, Kyle Zientek and Nicholas Piring. The hospital said it couldn’t release any information on conditions.

The campus parking lot where the shooting happened is just outside Mountain View Hall dormitory, which provides housing for many sororities and fraternities.

Iowa City, Iowa-based Delta Chi Fraternity said Brough, Prato, Zientek and Piring were members of the fraternity. The statement by Executive Director Justin Sherman said the gunman was not a member.

Brough’s Facebook page shows a photo of the Delta Chi house in Flagstaff.

Brough went to Broadneck High School in Annapolis, Md., for his freshman and sophomore years, said spokesman for Anne Arundel County public schools Bob Mosier.

During this time, he played at least one year of lacrosse, Mosier said.

Daisy Robinette, a freshman at Northern Arizona University, was co-workers with Brough at the Flagstaff Aquaplex. Robinette said Brough helped her get acclimated to school and her new job as a lifeguard.

“He showed me the ropes,” Robinette said. “He was so sweet and really good friends with everyone. He was just an all-around good guy. It’s just really sad that he didn’t get to spread more happiness on this planet.”

Robinette said the entire campus community is mourning together.

“There’s just an energy on campus today that is somber,” she said. “We’re all leaning on each other.”

The Town of Castle Rock released a statement about Brough.

“Colin was a member of our team working as a lifeguard during the 2014 summer season,” the statement said. “Our heartfelt sympathies are with his family and friends during this most difficult time. Colin will be dearly missed and always remembered.”

“What an amazing guy he was, always making people smile and laugh. It’s not real that this happened to him, but my prayers go out to his family,” Carlisa Caso, who knew Brough from Northern Arizona University, told The Denver Post via Facebook.

Courtney Montoya, a family friend in Castle Rock, took Brough’s senior photos in September 2012.

“It’s really sad,” Montoya said. “It’s surprising because you always hear about school shootings, but you never think you’ll know anybody actually in them. When I took his pictures, he was a really easy-going, fun kid.”

According to Brough’s LinkedIn page, he started working toward a business degree this year. He also was a member of the Alpha Lambda Delta Honor Society, his page said.

Elizabeth Hernandez: 303-954-1223, ehernandez@denverpost.com or twitter.com/ehernandez

The Associated Press contributed to this report.

Guns on Colorado campuses

Although Arizona is an open-carry state, Northern Arizona University’s ban on weapons on campus did not stop 18-year-old freshman Steven Jones from shooting four people, killing one, early Friday.

The University of Colorado and Colorado State University allow people with concealed-carry permits to go armed, as a result of a 2012 decision by the state Supreme Court, after CU tried to enforce a ban. The decision allowed permitted concealed-carry weapons on each college campus in the state.

However, Colorado’s Concealed Carry Act of 2003 requires that a permittee be at least 21 years old, which would block most undergraduates.