Surveillance video from December 28th, 2016 shows a man writing on the planter outside a building on West 123rd Street in Harlem shortly after 2 p.m.
The unidentified man in the video is seen wearing a black hooded shirt.
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The NYPD is asking anyone with information to contact Crime Stoppers by calling (800) 577-TIPS, logging on to their website at http://www.NYPDcrimestoppers.com or by texting their tips to 274637 (CRIMES) and entering TIP577. Tips can remain anonymous.