Forensic scientist tells double-murder trial about changes to contamination measures

A forensic scientist has told a murder trial jury that a change of procedure involving the wiping down of the outside of exhibit bags arose out of a contamination incident in Forensic Science Ireland in 2013.

Mark Nash (aged 42) who has last addresses at Prussia Street and Clonliffe Road in Dublin, has pleaded not guilty at the Central Criminal Court to the murder of Sylvia Shields (aged 60) and Mary Callanan (aged 61) between March 6 and March 7, 1997.