The police in Palm Springs, Calif., are mourning two officers who were shot and killed on Saturday while responding to a call about a domestic disturbance. One of the victims was a young mother and the other a veteran months away from retirement.

Dozens of law enforcement officers converged on the scene, where a third officer had been wounded, to help search for the gunman.

“I am awake in a nightmare right now,” said Chief Bryan Reyes of the Palm Springs Police Department.

The Riverside County Sheriff’s Department, which took over the case, said on Sunday that a suspect, John Felix, 26, of Palm Springs, had been arrested.