Place all ingredients in a slow cooker.
Turn slow cooker in low.
Cook for 6 to 8 hours. Cool.
With slotted spoon, remove cubed pork.
When pork is cool enough to handle, shred pork.
Return shredded pork to slow cooker.
Turn slow cooker to high, cook for 1 or 2 hours more.
Flour tortillas, salsa, minced fresh cilantro, lime wedges,
sour cream, shredded cheese and/or avocado slices.