Sephaul Booker was 15 when he was shot and killed on May 4, 2016, in Tucson. The shooting happened around 4:30 p.m. in the 3700 block of East 4th Street; officers found Sephaul in the parking lot of a duplex with at least one gunshot wound and he was pronounced dead at the scene.

Detectives initially sought two young men — described as Caucasian or light-skinned Hispanic, late teens or early twenties — who were seen in a white or light-colored small to mid-size SUV. Family and friends remembered Sephaul as quiet, funny and generous, and a candlelight vigil was held outside St. Marks Presbyterian Church to mourn him.

A primary suspect, Tristan Beardsley, was arrested on November 14, 2017, on Tucson’s east side and booked into Pima County Jail on charges including First Degree Murder, Armed Robbery, Aggravated Robbery and Aggravated Assault; he was later sentenced to 7.5 years in prison for manslaughter with credit for 223 days served. Does anyone who knew Sephaul or was in that neighborhood that afternoon have information that could add clarity to what happened?