Luis Santiago, 35, was shot and killed in an alley near 31st and National in Milwaukee in the late evening of Friday, August 21, 2015. The shooting followed a confrontation that began just after 7:00 p.m. when Santiago was approached by a group of three to five men; a brief argument escalated and gunfire followed.

Santiago’s death was the city’s 100th homicide of 2015. Family and friends held a vigil the next day, where more than 20 loved ones gathered and his sister Cecilia Santiago described the deep void his loss created. By Monday, August 24, Milwaukee police had taken three people into custody and said they were looking for additional suspects.

Are there details from that night or witnesses who haven’t been heard from that could help clarify what happened?