at 11:47:07 AM
That is strange, and a bit concerning.
Who knows the reasoning behind why he would leave his tools and equipment behind.
I would try and contact him a few more times, and then call the police if you are unable to reach him. They should know what can legally be done,as you are not his keeper of his things.
One would hope he just went on a vacation and would be back soon, and that he is not injured or worse.
I wouldn't throw his things out, because he could come back at you for taking away his livelihood.
I think the best bet is the police.