Bianca Horton, 26, was found fatally shot on the side of a road in Chattanooga, Tennessee, on May 25, 2016. A mother of four, Bianca was identified as a key prosecution witness in a high-profile gang-related case; her killing is described as a calculated effort to silence her before she could testify.

Bianca had survived a violent home invasion in January 2015 that killed her friend Talitha Bowman and left Bianca’s then one-year-old daughter Zoey paralyzed. Bianca was scheduled to testify against Cortez Sims, a validated gang member, in the 2015 shooting that injured Zoey and killed Bowman.

Investigators tied the murder to three members of the Athens Park Bloods: Andre Grier, Charles Shelton, and Courtney High. Authorities linked a white van used to kidnap Bianca to Grier by title records, and cell phone data placed Grier near Bianca’s home, workplaces, and where her body was found. Courtney High pleaded guilty to facilitating the murder; Charles Shelton died in jail shortly before his trial; Andre Grier was convicted on counts including first-degree murder and kidnapping and received life without parole.

Did anyone who knew Bianca, her routines, or movements in Chattanooga in 2016 see anything that could help explain how she was taken and killed?