FreeThinker comments:

imageI do not believe that the shroud is authentic for various reasons. Radiocarbon dating is not one them. Sceptics would be well advised to never mention these badly bungled tests again.

Timothy Roberts doesn’t seem to realize that statistics, no matter how carefully done, cannot compensate for non-homogeneity or material intrusion in a sample. Neither peat bogs nor mollusks that lived in carbon enriched water nor shrouds that have been mended with new thread can be radiocarbon dated, no matter how brilliant one might be with statistics.

At least not if the sample from the shroud is from a mended area, as seems to be the case.

Found in More on Mixing Up Faith and Science on the Carbon Dating of the Shroud of Turin « Shroud of Turin Blog