Shawn Christensen's “Richie” opens with a stark image: Richie himself, submerged in water colored red, contemplating self-harm. A phone call interrupts his despair; his sister unexpectedly asks him to babysit her daughter. The awkwardness of their reunion is immediately apparent—she seems relieved to have found someone willing to watch the girl, but not enthusiastic about it. He accepts and takes her to a bowling all…