Inspired to lead a life of service, Arndrea attended Emory University and spent the first decade of her career under civil rights legends Dr. C. T. Vivian and Anne Braden. Organizing the first National Conference on Hate Crimes, Arndrea helped build a national coalition that united constituencies across religions, geographies, ethnicities, gender, and sexual orientation as well as helping to build the Southern Coalition Against Racism and Bigotry. She co-authored the book When Hate Comes to Town, a Faith Based Edition to provide communities with effective non-violent responses.
Introduced by friends who recognized the shared purpose in their work, Arndrea later married Martin Luther King III. Together they are raising their daughter, Yolanda Renee King, the only grandchild of Dr. Martin Luther King Jr. and Coretta Scott King.