Trunk leakage :(, Captain, she's takin on too much water! Options

[subsolo_21]

I could really use some help here. For the past couple of weeks I've noticed that after it rains my the carpet in the outer left corner of my trunk will be wet. It didnt bother me at first b/c it wasnt that much and it wasnt getting on my system or anything, so i figured it would just evaporate and be fine. Then I noticed yesterday that the wood particle board stuff the goes over the spare tire was starting to bow up. I took all of the carpet ou8t today and took out the spare tire and found that there was water standing 3-4 inches deep in the area where the spare tires stays. After freaking out, i found the drain plug in the bottom of the trunk and drained most of the water and towel dried the rest. I closed the trunk and had my dad spray the water hose on it while i found the leak from inside. I cant be sure, but i think it is coming in through the driver's side gasket of my 3 post spoiler. Does anybody have a suggestion on how to fix this or anywhere else it could be coming from. Also, I found a drain line at the base of my antenna. Where should it go to, b/c it was just hanging down in the side compartment filling it w/ water as well.