Why does the child steal.

My son is 12 years old, he constantly steals everywhere: at home, in the store, he even robbed his beloved teacher. Persuasion, punishment does not work on him. Until the age of 10, he was registered with a neurologist with a diagnosis of hyperactivity, attention deficit disorder, now he is suffering from hypertension. He also spoils property, both his own and someone else's, for example, he likes to throw something at cars.