Valles Caldera Valles Caldera dates back to the prehistoric times: spear points dating to 11,000 years ago have been discovered. Several Native American tribes frequented the caldera, often seasonally for hunting and for obsidian, used for spear and arrow points. Obsidian from the caldera was traded by tribes across much of the Southwest. Eventually, Spanish and later Mexican settlers as well as the Navajo and other tribes came to the caldera seasonally for grazing with periodic clashes and raids. Later as the United States acquired New Mexico as part of the Treaty of Guadalupe Hidalgo in 1848, the caldera became the backdrop
Alex Marshall (police officer) Alex Marshall (police officer) Alexander John "Alex" Marshall QPM is a retired senior British Police officer who was the Chief Executive of the College of Policing from 2013-2017. Prior to this role, he was Chief Constable of Hampshire Constabulary from 2008 to 2013. In September 2017, Marshall retired from policing to work for the International Cricket Council, as general manager of its Anti-Corruption Unit.. Marshall studied at Wolfson College, Cambridge and the Institute of Criminology, University of Cambridge. He became a Cropwood Fellow in 1999. He obtained a master's degree in criminology at the University of Cambridge in 2006. Marshall