Thank you all for you input.
Mike, after seeing your purple bhut, I remember that the ones I grew in the past were rounded on the bottom too. The pods on this plant look a little more scorpion or bhut - like. They are definitely more pointy.
I tend to agree with those that suggest some kind of de neyde cross. The leaves are really dark, and the pods are a dark, dark purple for a long time, until they start turning red.
I'm not sure I ever had any Yaki Blue Fawn seeds, but I know I had several marked as PDN crossed with something else. I'll go through my seeds from that planting period and see if I can figure it out. It is a cool-looking plant and the pods are cool too.