Corey Warner, a 45-year-old African American man, was found dead in his Chicago apartment on December 22, 2017. His body was discovered bound with duct tape and showing severe trauma; the Cook County Medical Examiner’s Office determined he died from multiple injuries sustained during the assault. The Chicago Police Department opened a homicide investigation.

Investigators explored several lines, including reports that Warner had been involved in disputes with local gang members. Detectives interviewed friends, family and known associates as they worked to reconstruct the events before his death. No arrests were announced immediately after the discovery and the case remained open as detectives pursued leads.

What details about Warner’s contacts or the events in the days before December 22 might still help this investigation?