Season all sides of pork liberally with salt and pepper and place in slow cooker. To the bottom of the slow cooker, add water, bay leaves, thyme, and juniper berries.
Cover and cook on HIGH for 4 to 6 hours, or LOW for 8 to 10 hours. The meat should fall apart easily.
Transfer pork to a large bowl and shred with two forks. Skim fat off liquid in slow cooker if desired. Discard juniper berries and any thyme sprig stems.
For crispy edges, in a large skillet over high heat, heat 1 tablespoon olive oil until shimmering. Add pork in batches (3 to 4 batches), along with about 2 tablespoons juice from slow cooker, and cook without moving until browned on one side.
Toss the pork to flip and brown the other side briefly (you want both crispy and soft pieces), until all the juice has evaporated. Return to slow cooker and repeat with remaining pork. Season to taste with salt and pepper.