A couple of years ago, I caught my son (then 5 years old) stealing from me. My husband and I talked to him about it and we thought the matter was resolved, but we recently found out that he has been stealing from one of his playmates. How should we address this?

Try to be friendly to your son by calling him in a place where both of you can talk alone. Try to find out what was the thing he took from somebody and ask him why?From there you can find solution to the problem.Try to ask him if he can accept if others will take things from him without permission? Explain to him bad effects or the disadvantages of what he has done