Police were called to the 5700 block of North 19th Street in Philadelphia's Ogontz section around 2:30 a.m. on February 2.
Officers found 41-year-old Jermaine Graham shot multiple times.
He was taken to the hospital, then after a month was taken to rehab. On June 2, Graham was transferred to a nursing home.
He died the next day.
The City of Philadelphia is offering up to $20,000 in reward money for information that leads to an arrest and conviction.
If you have any information, call 215-546-TIPS (8477). All calls will remain anonymous.
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