 The two apparently left the vehicle with their dog to seek out shade, and sometime after that, Hope had passed away. PlanAlp says that Tucker's body showed no signs of trauma, but the Maricopa County Medical Examiner's Office has not yet determined her cause of death. And a Texas man is dead after going for a hike at the Grand Canyon National Park, says a 50-year-old stayed overnight at Havasupai Gardens and is trying to reach the rim as temperatures soared well over 100 degrees. I'm John Gilliland, and this is Arizona News.