NEW : Mary Kennedy , 52 , died of asphyxiation due to hanging , a local official says . She is called a gifted architect and a `` relentless advocate of green design '' She married Mary Kennedy in 2010 , and the couple had two children together . She also advocated finding a cure for food allergies and asthma and was a co-founder of the Food Allergy Initiative , the world 's largest private source of funding for food allergy research , Robert F. Kennedy Jr. 's family said . He filed for divorce in the same year , 2010 Mary Kennedy was arrested for DWI .
NEW : Mary Kennedy , 52 , died of asphyxiation due to hanging , a local official says . She is called a gifted architect and a `` relentless advocate of green design '' She married Mary Kennedy in 2010 , and the couple had two children together . He filed for divorce in the same year , 2010 Mary Kennedy was arrested for DWI .