Basement Waterproofing - Inside a closet, moldy drywall

This picture was taken after only a few days of rainy and wet weather. The basement had a very small leak, but that is all it takes sometimes. The mold spreads right up the wall, often times it grows behind (on the back side of the wall) and you can't even see it. However, you will smell it. It is one of those smells that most people associate with "Grandma's Basement."