A conversation with and presentation by Reyna Grande, author of “A Dream Called Home.” Part of UNA VOZ DESATADA, an intensely personal posthumous exhibition of the art and writings of Rocío Alvarado Lockwood (1961-2015). Revealed in three moments over four decades, it confronts the themes of child immigrant trauma, in-school abuse, and the scars carried from childhood. But most of all, it is a story about voice. One that is lost but eventually found …