Senaaj Jackson, 22, is accused in the shooting death of Masir Williams, 21, on September 7 on the 2300 block of Oakford Street.
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According to authorities, Marshals believed Jackson may be visiting a family member and took him to custody at about 6:30 a.m. at that home.
Jackson was taken to the Philadelphia Homicide Detective Division for processing.
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Chopper 6 over scene of Water Dept. worker shooting
Additional information about his arrest or charges was not immediately available.
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