Thanks everyone for all your help, but I think the mustang is toast. I found the schrader valve and discovered that I had ample fuel going to the engine. So I tried to start it up one more time. I turned the key and it turned and labored for a about a second and then nothing. The engine doesn't even want to spin anymore. It's completely seized up. I'll never know what happened or what was wrong with it, but I guess it doesn't matter anymore. Thanks again you guys for helping me out. I really appreciate it.
RIP Green 2000 Mustang