Would the a/c compressor leak coolant?

What is your question?

When I started my van, it started steaming from under front. Smelled like coolant. There was also a hissing sound. I drove it the 2 blocks back to work. Parked it and the hissing kept going. I sat there for about10 minutes and was still hissing when I went back in work. After work I looked for a leak but couldn't find it. I even drove to a more lite up parking spot and is not leaking. The only thing is, the ac was off when I moved it.