BELMONT (KRON) — The search is on for the person responsible for shooting and killing 17-year-old Mohammad Othman.

The Carlmont High School senior’s body was found just before 11 p.m. Monday night in the parking lot at Central Elementary School in Belmont.

“He was a really good kid always encouraging of his teammates, guys wanted to be around him, kind of an infectious personality,” said Carlmont football coach Jake Messina.

Messina says Othman, known as “Mo” to friends played both defensive back and wide receiver for the team and had planned to go to the College of San Mateo after graduating.

“Like anyone else, he had challenges that he dealt with and navigated and that’s the tragedy. I felt he had successfully navigated the difficulties he had in terms of academics and athletics,” said Messina. “I really thought he had made it to the other side of the mountain and the fact that this happened is devastating.”

On Tuesday authorities served a search warrant on a home in Pleasanton. Three people were detained but no arrests were made.

This was one of several warrants that have been served as part of the investigation.

Police don’t believe Othman’s killing was random.

They believe he and the killer knew each other.