Question: What month did the 2015 controversy surrounding Joshua Andrew Dolezal's sister came to media attention?

Context articles: Josh Ruffels
Josh Clarkson
Dave Kerpen
Josh Borja
University of Bristol admissions controversy
Joshua Dolezal
Josh Krajcik
Rachel Dolezal
Josh Harrop
Lancaster Central School District

Joshua Andrew Bernard "Josh" Ruffels (born 23 October 1993) is an English footballer who plays for Oxford United as a midfielder.
Joshua Andrew Clarkson (born 21 January 1997) is a New Zealand first-class cricketer who plays for Central Districts.
 In December 2015 he was named in New Zealand's squad for the 2016 Under-19 Cricket World Cup.
 He made his List A debut on 27 December 2015 in the 2015–16 Ford Trophy.
 Clarkson was educated at Nelson College from 2012 to 2014.
Dave Kerpen is an entrepreneur, author and reality television personality.
 Kerpen first received media attention in the Boston sports market in the late 1990s and early 2000s for his unique vending sales strategies at professional sporting events.
 He went on to appear as a contestant on Fox's 2003 reality television series, "Paradise Hotel", and earned additional media attention for his "sponsored wedding" in 2006.
 He is currently the CEO of Likeable Local, a social media software company for small businesses, as well as Chairman of Likeable Media, a social media marketing firm and author of the 2011 "New York Times" bestselling book, "Likeable Social Media", the 2012 book, "Likeable Business", the 2013 book, "Likeable Leadership," and the 2016 book, "The Art of People: 11 Simple People Skills To Get Everything You Want."
Joshua Andrew Borja (born 1 August 1990) is an American born Guamanian footballer.
The University of Bristol admissions controversy refers to an historic dispute over the admissions process for the University of Bristol in the United Kingdom which occurred in 2003.
 The 2003 incident was caused by concerns over bias in the admissions system that were perceived as favouritism towards state school students after the rejection of some students with strong academic records who attended independent schools.
 The University's widening participation policy allowed the awarding of slightly lower offers to promising applicants from schools with lower academic achievement.
 Controversy surrounding this policy resulted in a brief boycott of the University by some independent schools and intense media debate about the fairness of the admissions policy as well as praise and criticism of the policy and the boycott from politicians, student leaders and education groups.
 The boycott was lifted after two months when the Independent School's Council expressed satisfaction with the fairness of the admissions system.
 Two years later a survey of independent schools concluded that: "It is likely that rejections which may have seemed discriminatory to parents and schools have in fact, been due to a large rise in suitably qualified applicants" and independent evidence was compiled suggesting that claims of bias were wildly exaggerated.
 The controversy has now been superseded by the reality that all British Universities have active 'widening participation' policies designed to increase University applications from lower-achieving schools which tend, de facto, to be state schools.
Joshua Andrew Dolezal (also spelled Doležal ; born September 1975) is an American academic and writer.
 He is a full Professor of English studies at Central College (Iowa), focusing on American literature, creative nonfiction, medical humanities and sustainability issues.
 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.
 The book was described by Kim Barnes as an "intimate and lyrical story of fallen faith, found love, and the way we must sometimes circle back to find what we have lost."
 Dolezal is also the author of a number of essays, poems and academic papers.
Joshua Andrew Krajcik ( ) is an American singer-songwriter who currently resides in Columbus, Ohio.
 He began his career as a solo artist and later went on to form the Josh Krajcik Band with Corey Gillen and Mitch Pinkston.
 He was the runner-up in the first season of "The X Factor USA" in 2011.
In June 2015, Dolezal came to media attention when her European American parents stated publicly that Dolezal was a white woman passing as black.
 Their statement followed Dolezal's reports to police and local news media that she had been the victim of nine hate crimes; however a subsequent police investigation did not support Dolezal's allegations.
 Dolezal's critics contend that she has committed cultural appropriation and fraud; Dolezal and her defenders contend her racial identity is genuine while not based on biology or ancestry.
 In a November 2015 television interview, Dolezal publicly stated for the first time since the controversy began that she was born white but still identified as black.
Joshua Andrew Harrop (born 15 December 1995) is an English professional footballer who plays as a midfielder for Preston North End, having joined from Manchester United in July 2017.
The Lancaster Central School District is a New York school district including the area surrounding Lancaster, New York.
 The district consists of 7 schools and for the 2015-2016 school year has a total enrollment of 5,278 students .
 The current Superintendent is Dr. Michael Vallely.
 The school district had received national media attention due to controversy over the school's former mascot, the Lancaster Redskins.
 In June 2015, the mascot was changed to the Lancaster Legends.