How do I remove a spoiler on my 02 Dodge Intrepid SE?

I'm wanting to remove the spoiler on my Dodge so I can paint it. The way I was looking at it, there were six holes that were drilled on the inside of the trunk (its a hollow trunk lid) obviously after the painting was done, and I know it was an aftermarket spoiler, so I'm thinking these are the places where the bolts are. I got 4 of them off just by using a socket, but the other two have these weird rectangular plastic clips on them. I don't know what to think about them. I tried pulling them off with pliers, and I tried spinning them, but nothing is working. Just wondering if anyone else has ever seen these clips and knows what to do with them. Thanks!