Charles Mutua Mulli, one of the most interesting and inspirational people you’ve probably never heard of, woke up in his family’s hut in a tiny village in Kenya one morning in 1955 and discovered that his parents had taken his brother and fled. Charles had been abandoned. He was 6 years old. The tale of that child’s experiences over the ensuing 60 years is told in a compelling new documentary titled “Mully” (he later changed the spelling of his surname), directed by the actor/filmmaker Scott Haze. It is a rags-to-riches story of extraordinary dimensions – i.e., Mully literally went from...