What is the value of his goods roughly?
When is the last time you tried to make contact?
Sorry for the delay.
This is an issue of the law of abandonment. It is quite a complicated legal principle and basically there is no set definition.
My concern about destruction or removal of these items now is that you don\t seem to have warned him of your intention. that is not the end of the world but it must be done at some point.
I would try to make contact again in either text or email form making clear that you will dispose of the goods if he does not make contact within fourteen days.
Then if there is no contact you are protected.
Can I clarify anything for you?