Heat a large skillet(I like to use cast iron) on high heat. Season pork butt with salt and pepper all over.
Place butt in pan and brown on all sides. Make sure you get a good dark crust on it. Don't skimp on this step.
Place pork in crock pot and pour about 1/4 cup of barbeque sauce on pork and turn it over in crock pot to coat the butt all over. Then add liquid smoke. (you can adjust this to your taste I find 1 teaspoon enough for us)
Cover and cook on low for 8 hours. Remove pork from crock pot and pull meat apart.Drain off all but a 1/4 cup of juice in pot and mix with the remaining barbeque sauce.Return pork to crock pot and add the sauce. Mix to combine. Leave pork in crock pot till hot and serve. you can add more sauce if needed.