Graffiti in support of Soldier F has been painted on Free Derry Corner.
The stencilled text sprayed in the heart of the Bogside has a Parachute Regiment logo above it.
It is an escalation in the campaign in support of the British soldier, who is accused of murder, and a clear act of provocation given its location.
The campaign is said to have retraumatised the Bloody Sunday families.
On March 14 this year, the PPS announced that Soldier F would face the charges having considered the prosecution of 18 former soldiers and two former members of the Official IRA for their actions in the Bogside on January 30, 1972.
The former member of the Parachute Regiment, known only as Soldier F is expected to be formally charged with two counts of murder in relation to James Wray and William McKinney.
He will also face four counts of attempted murder in relation to the late Patrick O'Donnell and Michael Quinn, Joseph Friel and Joseph Mahon.
Soldier F has yet to appear in court.
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