Erin Lee Carr (“Thought Crimes: The Case of the Cannibal Cop”) returns to HBO to explore another true-crime story in the age of social media in MOMMY DEAD AND DEAREST, a shocking look at one of psychology’s most controversial conditions: Munchausen by proxy syndrome. Featuring exclusive interviews with Gypsy Rose Blanchard from prison, the provocative documentary untangles a web of lies, child abuse, mental illness and forbidden love when it debuts MONDAY, MAY 15 (10:00-11:30 p.m. ET/PT).