Robert Sheaffer, a founding member of the Committee for Scientific Investigation of Claims of the Paranormal, asserted that Beckjord "doesn't have one bit of proof. To allay Beckjord's proclamations that "all skeptics were too timid and closed-minded to actually go out into the woods and confront the Bigfoot evidence for themselves," Sheaffer accompanied Beckjord on a 5-day Bigfoot expedition in 1999. He was disappointed at Beckjord's continued lack of evidence and attributed Beckjord's interpretations of rock formations, leaves and shadows as Bigfoot faces or skulls to "the workings of an overzealous imagination."