Yorkshire undergraduate Joanna Parrish was working as an English tutor in France when she disappeared in May 1990.
The Leeds University student went missing on the night of May 16 to 17 after she had placed an ad in a local newspaper in Burgundy offering private English lessons and arranging to meet a man.
Her naked body was found in the Yonne River in Auxerre the following day. She had been abducted, stripped, beaten, bound and strangled, according to reports.