The Team

Co-Founder and Executive Director

Dr. Robin Reineke co-founded the Colibrí Center for Human Rights, building on nearly a decade of work at the Pima County Office of the Medical Examiner to support families of missing migrants. From Seattle, Washington, she received a B.A. in Anthropology from Bryn Mawr College in 2004, and a PhD from the University of Arizona School of Anthropology in 2016. In addition to her work with Colibrí, Dr. Reineke is Assistant Research Social Scientist in the Southwest Center at the University of Arizona, focusing on global and regional migration and human rights. Dr. Reineke was awarded the Institute for Policy Studies’ Letelier-Moffitt Human Rights Award and the Echoing Green Global Fellowship, both in 2014.

Selected Publications:

Deputy Director and Co-Founder

Chelsea Halstead grew up in Flagstaff, Arizona and moved to Tucson in 2008 to earn her B.A. in Geography from the University of Arizona. After studying and working for a year in Guatemala, Chelsea returned to complete her senior honors thesis which explored humanitarian border activism and migrant death. After graduating in 2012, she worked as a Research Assistant for a Department of Justice-funded study investigating the practices, protocols, and procedures associated with the handling of migrant remains along the border. In 2013, she was selected for a Humanity in Action Fellowship in Berlin to study modern human rights abuses through the lens of the holocaust. Following her fellowship, Chelsea became a volunteer with the Missing Migrant Project and later a founding team member of the Colibrí Center for Human Rights. In 2014, she was the recipient of the Award for Excellence in Global Service from the University of Arizona. In 2015, she was a keynote speaker at the Clinton School of Public Policy in Little Rock, Arkansas. Her work focuses on migration and the border, race and gender politics, structural violence, and post-conflict reconciliation efforts.

Communications Manager and Co-Founder

Reyna Araibi graduated summa cum laude from the University of Arizona Honors College earning her B.S. in Public Policy and Nonprofit Management and writing her honors thesis around imagery, communications, and creating empathy. Growing up in Tucson as the daughter of an an immigrant and as a Chicana/Arab-American, Reyna developed a passion for social justice and human rights in an identity and context very much affected by immigration topics. In 2013, she began volunteering with the Missing Migrant Project and later became part of the founding team that grew this project into what is now the Colibrí Center for Human Rights. In 2016, she became a Humanity in Action fellow in the John Lewis Fellowship in Atlanta, Georgia, studying intense connections between human and civil rights in an American context. Her work at Colibrí focuses on witnessing, testimony, and using various communication methods to impact more human-centered narratives about immigration and the U.S.-Mexico border.

Missing Migrant Project and DNA Program Manager

Mirza Monterroso, originally from Guatemala, is a licenciada in Archeology and is currently finishing her M.A. in Forensic Sciences. She worked for several years in Mayan archaeology sites and caves in Guatemala, Belize, and México. In 2006, Mirza began working as a forensic archeologist, digging the clandestine graves created during the Guatemalan genocide. She has been an expert witness in cases of violations of human rights and crimes committed against the civil population. Mirza has also taught several courses in forensic anthropology at the Universidad de Rafael Landívar and the Universidad de San Carlos in Guatemala. In 2016, she joined the Colibrí Center as the DNA Program Manager.

Missing Migrant Project Associate 

Arturo Magaña grew up in Somerton, Arizona and El Golfo de Santa Clara, Sonora, Mexico. He earned B.A.’s in both Urban Planning and Anthropology from Arizona State University. In 2017, he graduated with an M.A. in Cultural Anthropology from Northern Arizona University. For his master’s thesis, he wrote a book about fishermen who work in the Sea of Cortez. As Missing Migrant Project Associate, he works with families of the missing collecting missing persons reports and updating Colibrí’s database.


Family Network Coordinator

Ben Clark was raised in Atlanta, Georgia. In 2016, he graduated from Middlebury College, where he received his B.A. in History with minors in Sociology and Spanish. Growing up in the southeastern United States, Ben wrestled with questions of social (in)justice from a young age. His work, influenced by his upbringing, has focused on reckoning with divisive pasts to create more inclusive futures. He brings several years of experience in immigrant justice advocacy in the United States as well as in Argentina. In 2016, Ben received a Thomas J. Watson Fellowship, enabling him to spend a year living with and learning from communities around the world healing from periods of political violence and trauma. In late 2017, Ben joined the Colibrí team as Family Network Coordinator, working with families to develop programs that build community and support amongst those who have suffered a loss on the border.