The last known jaguar in the United States, known as Macho B, was euthanized on March 2nd after doctors determined that it had irreversible kidney failure. Now, according to the NYT, the federal government has opened a criminal investigation into the capture and death of Macho. A staff member of the Borderland Jaguar Detection Project, a group that worked with the Arizona Game and Fish Commission on jaguar conservation, claims to have been told by her boss, a biologist working for the Arizona Game and Fish Commission, to place female jaguar scat within six feet of a leg hold trap that was meant to capture mountain lion and black bear.Read more here.