Where evidence supported the U.S. District Court’s finding that the defendant was responsible for transporting pure methamphetamine, the fact that the district court had previously sentenced co-conspirators for transporting a mixture, did not lead to finding of error.The 7th U.S. Circuit Court of Appeals affirmed a decision by Chief U.S. District Judge James D. Peterson, Western District of Wisconsin.Marcos Castaneda supplied methamphetamine as part of a conspiracy run by Joseph Kujawa. According to Kujawa, Castaneda …