Alandis Allison was 16 when he was fatally shot on May 24, 2017, in Chicago’s South Shore neighborhood. His death came amid a surge of gun violence that year in the city, which recorded more than 500 homicides by late summer 2017 and saw young men in disadvantaged neighborhoods disproportionately affected.

Allison’s killing is described as one of many losses that devastated family and friends and highlighted the ongoing danger in vulnerable communities like South Shore. What details about the shooting or potential witnesses can help bring more clarity to what happened that day?