Pete Castleberry graduated from Lewis and Clark Law School in 2010 and immediately started a private criminal defense practice with his law partner Emily Elison. In law school, Pete studied Animal Law and was a member of the Lewis and Clark Animal Law Clinic where he worked on issues related to Confined Animal Feeding Operations. Pete also served as a member of the Non-Human Rights Project where he researched and wrote about ancient slavery laws and their potential applicability to modern Animal Law issues.