Mario Mojica Rios, 20, was fatally shot on August 20, 2016, in the Hermosa neighborhood of Chicago. His death came during an especially violent month for the city — August 2016 is recorded as a peak in homicides over the previous two decades and featured a surge of shootings across Chicago.

Mario was one of several young victims lost during that spike in gun violence, a period that highlighted serious challenges facing neighborhoods struggling with crime and instability. Few personal details are included beyond his age, location, and manner of death.

If anyone knew Mario, his routines, or witnessed events in Hermosa on or around August 20, 2016, please share what you know.