Metal noise from the trunk in my accord 2011
 

I am looking for some help 2with metal noise coming from the trunk in my accord 2011. The noise is from boot most of the time. The noise is more like a metal under weight. How should i check which part is making noise or get it fixed? I have got my car looked at by dealer and he could not notice the noise at that time and there is nothing wrong with suspension

Could the noise possibly be coming from under the car? Check exhaust system, heat shields, etc

It's coming from inside the trunk

A few of these had an issue where there were some bars that would rattle against the "package tray" shelf in the trunk? I can't put my hands on the service document right now to see if the '11's were part of it.