I wonder what my frame of mind might be if my daughter had killed my granddaughter

I can't begin to imagine the horrible thoughts that have gone through the minds of the grandparents. I know they did so many things to obstruct the investigation, Would I do the same thing if my daughter or son done the things Casey has done....I don't know because I can't imagine that ever happening, I'd like to think I would not cover up any evidence. The thing about washing the pants, I keep thinking, Grandma did'nt even have to mention them at all, but she did. I can't understand why they were'nt out searching those wooded areas with the searchers unless the authorities told them not to.