"Texas — Four notes were found at a home where the mayor of an upscale Dallas suburb apparently shot her 19-year-old daughter to death before fatally shooting herself, police said Wednesday. An envelope taped to the front door of Mayor Jayne Peters' home contained a key to the house and a typed note warning police they would find something unpleasant inside, Coppell Deputy Police Chief Steve Thomas said. Three other notes contained instructions for managing family affairs, such as taking care of the dogs, but did not provide explanations for the deaths of Peters and her 19-year-old daughter, Corinne. ""It appeared to me that there had been some thought,"" Thomas said. Police found the bodies Tuesday after the mayor failed to show up at a city council meeting. They said the Dallas County Medical Examiner's Office ruled Wednesday that the case should be officially classified as a homicide-suicide investigation."