Do you have more information on this incident which would justify execution?
All we know from the article is he was walking around the neighborhood with a tool. No indication provided that he threatened or hurt anyone.
Do we know if the car was his? The wonderful media didn't say.
If the car belonged to another, then the police can take a malicious destruction of property report.
He then went into HIS garage and started burning things, which being in HIS garage probably were his.
Have the Fire Department come protect exposures and leave the man alone, unless, or until he actually does something to someone else.