Lynette White was stabbed more than 50 times in a flat above a betting shop
A man has appeared at Cardiff Crown Court to deny perjury nearly 20 years in a murder trial.
Mark Grommek is accused of giving false evidence against Ronald Actie and Yusef Abdullahi, two of five men charged with killing prostitute Lynette White, 20.
She was stabbed to death in 1988, and Mr Actie and his cousin John were cleared at trial in Swansea in 1990.
Mr Abdullahi and two others were jailed in 1990 but cleared on appeal. Killer Jeffrey Gafoor, was jailed in 2003.
Ms White's body was found in a flat in the Butetown area of Cardiff on St Valentine's Day, 1988.
Ronald and John Actie were cleared at a trial in Swansea but the others, who became known as the Cardiff Three, were convicted.
However, they were freed by the appeal court in 1992.
Gafoor was not identified for another 11 years, following advances in DNA research. He admitted her murder and was jailed for life.
Mr Grommek denies three counts of perjury. The prosecution will open its case on Friday.