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Authorities also released a photo of an expensive watch that was stolen from Reverend Canon Paul Wancura's Shelter Island home back on March 19.
The 87-year-old was badly injured and died this past Monday.
Police hope the reward will help spark tips and lead them to the killer.
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Anyone with information in regards to this incident is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).
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