Secret for a Satyr by dorothy bodoin

When Cressa Hannett finds the body of her elderly neighbor, piano teacher Libby Dorset, drowned in her ornate backyard fountain, it's horrible enough. But shortly before she discovered the body, Cressa witnessed a cloaked figure lurking nearby. Did she see Libby's killer? Did the killer see her? The killer has too much at stake to let Cressa expose the truth!