Season the chicken with salt and pepper, then coat lightly in flour.

Place the chicken in the slow cooker and scatter the capers over it.

Melt the butter in a saucepan, stir in the lemon juice and broth, and pour over the chicken.

Cover and cook on LOW for 4 to 6 hours or HIGH for 3 to 4 hours, until the chicken reaches 165°F.

Transfer the chicken to a serving plate, spoon the slow-cooker sauce over it, and garnish with parsley.