When Leo Igwe was a child in Nigeria, he saw his father get beaten for being accused of witchcraft. Igwe has made it his life’s work to help people accused of being witches and visits camps where they take refuge. Also in this show: For the last five years, photographer Murray Ballard has followed the practice of cryogenics and the people who choose to freeze themselves after death in the hopes that technology will allow them to come back to life.