Markus Tanner, a 23-year-old father of two, was shot and killed on July 11, 2016 near his home at the intersection of Lakeshore Boulevard and Carder Street in Jacksonville, Florida. According to accounts, Tanner was walking when someone on a bicycle approached and shot him point-blank; he died at the scene before help could arrive.

The slaying has left the family devastated. Tanner’s aunt, Robin Clemons, described the depth of the family’s grief and noted Tanner’s twin sibling has been particularly affected. Grandmother Gwendolyn Dubose publicly pleaded for justice and urged the person responsible to come forward. Police say the investigation remains open and are asking anyone with information to contact authorities or submit an anonymous tip through Crime Stoppers.

If anyone knew Markus or saw activity near Lakeshore Boulevard and Carder Street on July 11, 2016, please come forward with information.