This is an interesting, well written posting:
. . . Various tests have been performed on the shroud, yet the debates about its origin continue. Radiocarbon dating in 1988 by three independent teams of scientists yielded results published in Nature indicating that the shroud was made during the Middle Ages, approximately 1300 years after Jesus lived. Follow-up analysis published in 2005, however, indicated that the sample dated by the teams was taken from an area of the shroud that was not a part of the original cloth. This analysis itself is questioned by skeptics such as Joe Nickell, who reason that the conclusions of the author, Raymond Rogers, result from "starting with the desired conclusion and working backward to the evidence". Former Nature editor Philip Ball has said that the idea that Rogers steered his study to a preconceived conclusion is "unfair" and Rogers "has a history of respectable work". As of 2005, there is no universally accepted carbon dating result for the shroud in the scientific literature. . .
Read the entire posting.