Almost a year after the 25-year-old Bangor woman vanished from a caravan site, walls have been smeared in Belfast and Co Down.
The graffiti, which names one of the last men to see her alive, says: “Tell the police where Lisa’s body is and live.”
Despite a search operation across land and sea, no trace of the woman’s body has been found.
She was last seen at a party on a near deserted caravan park in Ballyhalbert, Co Down on February 28, 2005.
It is believed Lisa had become friendly with a crowd with suspected paramilitary connections.
Her anguished family have set up a confidential website and offered a £10,000 (€14,610) reward in a bid to find out where her body is.
Several men have been questioned about the disappearance, including the man whose name appeared overnight near the Village district of south Belfast, in Bangor and along the Ards Peninsula. It is thought he was with Lisa when she left her home in Bangor to go to the caravan site.
He is understood to have past affiliations with the Loyalist Volunteer Force.
His family are believed to have moved to the Belvoir estate in Belfast after moving from Bangor.