On my 2012 Escape Hybrid I have been having a very annoying squeak coming from right rear cargo area when traveling above 60 mph for months. No sound below that speed. I have partially removed the inner panel and with my wife driving tried to determine the cause and exact location but can only say that it sounds almost like it is coming from between the outer fender and inner metal structure. I can not find anything loose. The cars has about 93K. The shock/strut appear to be OK but are the originals. Any thoughts recommendation of what is causing the problem would be appreciated.