Geologist used Google Street View to help identify possible source of murder weapon, trial hears

A geologist has given evidence at the Central Criminal Court that a bloodied rock allegedly used in the murder of a pensioner near Sliabh Liag in Donegal was most likely transported to the scene by human activity rather than occurring naturally there. Dr Sophie O'Connor of the Geological Survey Ireland told the trial she used Google Street View to trace a rock matching the alleged murder weapon to a wall on Roshin Road between Sliabh Liag and Killybegs. The 3.5-kilogramme quartzite rock bore strong similarities in shape, size and lichen staining to the rock recovered by gardaí, she said. DNA evidence previously heard matched the rock to the deceased, Robert Robin' Wilkin, aged 66. Alan Vial of Drumanoo Head, Killybegs and Nikita Burns of Carrick both deny his murder on 25 June 2023. The prosecution case has now concluded, with closing speeches to begin on Monday.