Gregory Dixon, a 29-year-old African American man, was killed in Chicago, Illinois, on May 25, 2013.

Investigators questioned and apprehended several suspects. One named suspect was Hubert Gregory, who reportedly was convicted of armed robbery and murder and sentenced to concurrent terms of 5 to 15 years for armed robberies and 30 to 60 years for murder. An accomplice named Leroy Dixon pleaded guilty and received a sentence of 14 to 30 years.

What details about the incident or the people involved can readers add that might help clarify the timeline or motives?