Heat a heavy bottom, wide open or cast iron pan to the point of smoking.
Place the meat, joint side down, in the pan, allowing it to sear for 5 minutes.The pork should easily pull away from the pan when it is properly seared.
Carefully turn the meat so that you sear all sides of the meat. No need to sear the fat side.
Place the seared pork, fat side down in the crock-pot slow cooker. Cook as directed.