The ongoing murder investigation targeting the parents of Madeleine McCann may turn on the reliability of sniffer dog evidence. In the United States, such evidence is valid as a basis for probable cause in some cases and certainly for reasonable suspicion under the Terry standard. However, as admissible evidence, courts have balked. A Wisconsin case that turned on such dog evidence was thrown out in Wisconsin and McCann lawyers are seeking information from the Zapata murder case. Sinffer dogs have a documented error rate of as much as 78 percent in some cases. For the full story, click here