The phenom composer's first opera gets a live recording. The cast and the Met orchestra are led by conductor David Robertson, a post-minimalist expert. The story follows Detective Anne Strawson's investigation of a young boy's stabbing. Though drawn from real life, the opera isn't standard true-crime -- it's more interested in the performative aspects of identity play. Modern opera fans will hear traces of Adams and Glass, but Muhly's vocal writing has its own sound (see Strawson's "Even Senseless Crimes Make Sense" and the choral sections that evoke anonymous, late-'90s chat rooms).