Complex sentence: One year after the incident, under the care of Dr. Leslie Thompkins, Tim was rehabilitated, but Bruce forbade him from being Robin again, blaming himself for what happened and vowing to never again endanger another young partner.
Split into simpler sentences: One year after the incident, under the care of Dr. Leslie Thompkins, Tim was rehabilitated. However, Bruce forbade Tim from being Robin again, blaming himself for what happened and vowing to never again endanger another young partner.