In 2009, Los Angeles-based photographer Amy Elkins embarked upon a photography project titled "Black is the Day, Black is the Night." She did so by reaching out to seven men online, all of whom she'd met through a prison pen pal website. She set up a P.O. Box and began writing to each of them, sending letters from her then home in New York to California, Nevada, Georgia, Idaho, Texas and Mississippi.
All of her recipients had one thing in common -- they were all serving a life or death row sentence in maximum security facilities across the country, having been confined to the inside of a prison for anywhere between 13-26 years.