Oxford — She'd rarely left the house in the four months since the shooting, but on the first warm day of spring, 16-year-old Reina St. Juliana slid her lacrosse backpack over her shoulders, said goodbye to her parents and stepped out the front door.

It was 4:30 p.m. on a Monday in mid-March, and her friend Olivia Curtis, also 16, idled in her SUV in the long driveway. Reina got into the passenger seat and shoved her lacrosse stick at her feet.