LEAN was founded in 2010 by Theresa Smith, in response to the fatal shooting of her son by law enforcement in Anaheim, California. Theresa wanted to find a way to enact real change in her community, to help other mothers and families who were grieving their own loved ones, and to work with law enforcement to reduce bias and increase accountability. Since its founding LEAN has presented at local and national events, hosted workshops and discussions, met with community and law enforcement leaders, and advocated for legislation on law enforcement accountability. LEAN is fiscally sponsored by The American Civil Liberties Union (ACLU) of Southern California.