Robert Allen was 19 when he was fatally shot in Chicago on June 13, 2013. The homicide occurred on the city’s South Side during a year that saw a surge in violent crime; Allen’s death was one of 415 homicides recorded in Chicago in 2013.

The case description says the investigation encountered the same obstacles that hindered many cases that year: a lack of witnesses and other challenges that made solving shootings in high-violence neighborhoods difficult. Those investigative setbacks left families with unanswered questions while overall clearance rates remained low.

If anyone knew Robert Allen, saw activity in that South Side neighborhood on or around June 13, 2013, or has information relevant to the shooting, please come forward.