Question: What month did the 2015 controversy surrounding Joshua Andrew Dolezal's sister came to media attention?
Sentence (from "Joshua Dolezal"): He is also the author of a memoir, "Down from the Mountaintop: From Belief to Belonging", which details his upbringing in "a strict, cult-like Christian family" and which received widespread attention in connection with the 2015 controversy surrounding his sister, Rachel Dolezal.
Relevant evidence: Yes