Carlton County prosecutors formally charged Donald Albin Blom yesterday in the kidnapping of 19-year-old Katie Poirier from the Moose Lake convenience store where she worked. The felony charge carries a maximum penalty of 40 years in prison or a $50,000 fine. At Wednesday's arraignment the Carlton County prosecutors also described the evidence gathered against Blom so far, including his conflicting stories of where he was when Poirier disappeared.