Investigators say 29-year-old Trooper Nicholas Clark was shot and killed by 43-year-old Steve Kiley while responding to a domestic call early Monday morning.

What led a school principal to open fire and kill a New York state trooper in Steuben County?

Investigators say 29-year-old Trooper Nicholas Clark was shot and killed by 43-year-old Steve Kiley while responding to a domestic call early Monday morning.

According to a biography, which is no longer on the school district's website, Kiley had more than 10 years experience as a school administrator. He worked in the district since 2006. Later Tuesday, the superintendent of the Bradford Central School District is expected to hold a news conference.

The shooting happened after authorities say Kiley's estranged wife called 911 call from their home on Welch Road in Erwin, near Corning. His estranged wife told police he was armed and contemplating suicide.

During the response, Trooper Clark was shot. Police say Kiley then killed himself.

As we wait for more answers, the community is gathering to remember Trooper Clark. He grew up in Canisteo -- his body was escorted there last night.

His hometown remembers the Canisteo-Greenwood High School graduate as an all-around athlete and now a hero.

"He made an impression on everybody," said Mickey Woodworth, his former wrestling coach. "He was my first state champ. We worked hard and he’s my first state champ. Just can’t believe he’s gone.”

"I feel bad for the family," said Ann Hosmer, a retired athletic director. "My heart goes out to them. It's going to be a really, really hard time. and all the kids who came up with him. There’s a bond there that will never be broken.”

Flags across the state at all government buildings are at half-staff for Trooper Clark. He had been on the force for three years before he was shot and killed.

Funeral arrangements for Trooper Clark have not been announced.