A mural honoring the service and sacrifice of a Philadelphia police officer killed five years ago while trying to stop a robbery has been defaced. Graffiti was found on the mural of Sgt. Robert Wilson III at 60th Street and Baltimore Avenue.

Spray-painted on the mural were the acronyms “ACAB” and “FTP” which are two anti-police slogans, as well as a symbol used by anarchists. Late Sunday, the artist responsible for the mural removed the graffiti.

FOP President John McNesby tweeted Sunday morning saying they were aware of the issue and are working to get it fixed.