In a small bowl, combine the cumin, onion powder, chili powder and cayenne pepper.
Rub the mixture onto the pork tenderloin making sure to cover it completely.
In a large saute pan, heat the olive oil over med-high heat.
Add the pork tenderloin to the pan and sear, approximately 1-2 minutes on each side.
Place the tenderloin in the bottom of a slow cooker coated with cooking spray.
Cover with the peppers, onions and cherry pepper juice. Sprinkle with salt and pepper.
Cover and cook on low for 5-6 hours or until the meat shreds easily with a fork.
Uncover and shred the meat using two forks. Stir the carnitas mixture with the juice, cover and cook for an additional 30 minutes.
Serve with whatever idea you dream up. I toasted corn tortillas and added the carnitas mixture....topped it with red onion, pepper jack cheese, diced tomatoes, lettuce and avocado. Instead of sour cream I used low-fat greek yogurt.
Notes
Make ahead, pork carnitas can be frozen for up to 3 months in an airtight container.