Legally??? You more than likely do not "own" the tools...

Morally??? If the scammed you then heck with you making any effort to return them...

Suggestion: Find a safe storage place for them that is out of your way and put the entire episode out of your mind... If the bum decides one day that he wants his tools and gets a lawyer and you have disposed of them without obtaining "legal possession" then you will be victimized again by the jerk...

B~