On August 27, 2003, Juan Valles, a 34-year-old Hispanic man, was one of six employees killed in a mass shooting at Windy City Core Supply, an auto parts warehouse on Chicago’s South Side. The attacker, identified as 36-year-old former employee Salvador Tapia, had been fired from the warehouse about six months earlier and returned armed with a semi-automatic handgun.

According to accounts of the incident, Tapia entered the building around 8:30 a.m., tied up one worker, told him he would not be killed but intended to make others pay, then waited and shot employees as they arrived. The shooting ended when Tapia exchanged gunfire with responding officers and was killed by a SWAT team member. The weapon was reported to be a Walther PP .380-caliber handgun believed to have been obtained illegally, and investigators found that Tapia had left threatening messages on the warehouse answering machine in the months before the attack.

Anyone who knew Juan Valles or worked at Windy City Core Supply and has information about that morning is asked to come forward.