Remove excess fat from carnitas. Cut the pork into bite sized pieces.
Chop onion. Slice jalapeno in half then slice the whole pepper. Slice the garlic pods very thin. Chop the tomatoes.
Put all of the ingredients, except the salt, into a slow cooker. Cook on high for 3 hours. Cook on low for 5 hours. This will be rather hot with spices and peppers. I like my chili salty and add at the end, but exclude the salt at your preference.