Anthony,
I'm sorry for your loss and I hope you do learn from it, but I think it's important to also understand why this happened. A wrapped late stage wrapped umbilicus would not be the cause of death. When a ball python hatches, it fully absorbs its yoke before leaving the egg. The reason they get wrapped or even stress leaving the egg prematurely is due to pre-mature egg cutting and fussing with the eggs. That baby if you left in the egg uncut for let's say the next 10 days probably would have been just fine. I will put together a video on how I go about incubating, cutting eggs, etc. Again, I'm sorry for your loss but I already saw it happening from the video unfortunately. I wasn't always perfect, and I've made mistakes in the past too. I have bad stories to share, so don't think I'm picking on you, I understand how it is. I've been there too, I'm just here to help too. It's hard to be patient with these animals. It's so much FUN, and feels like Christmas morning all over again. It just takes a discipline that I've learned to respect tremendously. Hope the others do well for you and you share some pics!