Police have renewed their search for a woman who is believed to have smuggled cannabis into Wellingborough Prison.
Esther Loveridge, 31, was arrested at the prison, which has since closed, on April 24, 2011.
A police spokesman said: “After the incident, she failed to answer police bail and was officially classed as wanted.
“However all ongoing enquires since then have failed to locate her.”
She is known to have links with the Leicestershire, Cambridgeshire and Essex areas.
Anyone with information about her whereabouts can call Northamptonshire Police on 101 or information can be given anonymously to Crimestoppers on 0800 555111.