Harold Howell, 62, was preparing to attend Easter services when two men beat him, tied him up and robbed him. He was in his apartment at Cleveland and Evergreen.
He died 11 days later.
The building is managed by "Urban Properties Advisors." The company could not be reached for comment.
Howell's family said the property managers and security didn't do enough to keep the building safe. Police have not made any arrests in the case.
They're looking for Howell's black 2011 Chrysler 200 convertible. The car has Illinois license plate X73 4415.