 This happened just before 7.30 in Garfield Park. Noah was walking her dog when she became trapped under the branch, which broke off a 100-year-old tree. Three different witnesses told police they heard multiple loud cracks before that branch fell. In the meantime, DDOT says we may never know what caused that tragic accident. WDTOP's Cheyenne Corrine is hearing from a local certified arborist who says he has a good idea of what may have happened.