mold behind drywall near plumbing 32

https://themoldremediationstlouisguide.greyhavendaily.com/posts/how-a-hidden-plumbing-leak-led-to-a-full-mold-remediation-st.-louis-job

I noticed a musty smell in the bathroom and when I finally pulled back a loose section of drywall near the shower, I found a patch of black mold spreading behind it where the plumbing had a slow, hidden leak.