Add BBQ sauce, water, Dijon mustard, chopped jalapeno, garlic, smoked paprika, chili powder, salt and black pepper to the crock pot and stir to combine.
Add chicken breast to crock pot and toss to coat well.
Cook on low for 6-7 hours or high for 3-4 hours.
Once done cooking, shred the chicken and mix with the sauce before serving.
Notes
I find there is enough sauce to coat the shredded chicken well after it cooks; however, if you feel like it needs extra BBQ sauce, add what you need.