Finding Mold After Roof Leak
Honestly, anywhere. Mold grows on walls, ceilings, windows, floors, furniture, air ducts, on clothes, etc.

My water heater had burst in my basement and had gone unnoticed for 3 days (I was away on vacation). I hired a restoration service. They found mold all the way on the opposite end of the basement. They said it was because of heavy moisture in the room.

Mold is one thing that is not worth messing with. I would hire a contractor to take an air quality test to confirm.