ceiling seen mold; need help to locate source of moisture

southlake near soapstone, Reston VA

Description

My tenant of my condo unit reported ceiling in the living room and dining room having had molds. See this short video and attached pictures. I suspect the mold may be due to moisture from the upstairs unit. If you believe you are qualified to help me with finding the source of the moisture that caused the mold, please reply this ad with confidence, and preferably with a quote/estimate for the diagnosis work.