A shoplifter goes to steal something. Another customer stops them by lifting them up and throwing them down on the ground and inadvertently fracturing their spine, leaving the shoplifter in a wheelchair for life.
The shoplifter wouldn't have been crippled if they hadn't tried to commit a crime. The customer didn't mean to injure the shoplifter permanently. An appropriate punishment for shoplifting would be a fine, some physical pain, or internment.
How much blame is there to go around? How do you reckon with the consequences? Should any remedial action happen?