Roof Sagging on Tent Camper

[banjo]

I have a 2003 Rockwood Freedom Model 1980 camper that has approx. 500 miles of towing on it. I pulled in the house after a weekend camping trip last weekend and noticed that the front half of the roof was visibly sunken down about 3 inches and appears to have had a failure in the roof support sustem. I do not have an AC on the roof. Does anyone have an experience with this and what might be done about it. I have attached a photo that might be helpful

[PumaPro]

a small water leak may cause a roof to de-laminate & lose strength. It could be a water leak such that the water enters the roof but doesn't leak out of the roof becoming trapped and destructive. Check seals.