April 16 (UPI) -- A California woman accused of drowning her 7-year-old daughter has been charged with murder. "The alleged facts of this case -- where a mother is accused of intentionally taking the life of her young child -- are profoundly tragic and deeply unsettling," Los Angeles County District Attorney Nathan Hochman said Tuesday in a release . On Friday, 37-year-old Graciela Xiomara Castellanos was arrested after police found her unresponsive daughter, Rebecca, in a bathtub before 6 p.m.