Season the pork with salt and pepper and place into the slow cooker. Combine the garlic, jalapeno, soy sauce and brown sugar and stir to dissolve, pour over the pork.(NOTE: If your slow cooker runs hot, add 1/4 cup water). Cover and cook on low for 6 hours until the pork is very tender, turning once half way through if desired. When the pork is ready, shred the meat. Reserve the sauce.