I am sorry that your wood is missing.
The lesson here is that DMS is not a good place to leave something lying around.
There are too many members to allow everybody to do that for too long.
If it is not in a personal storage bin, properly placed in project storage or one of the accepted exceptions like a project drying on a work table with a note stating the owner and when it will be removed, there can be no expectation it will not go missing.
If I had to leave some wood like that for someone else, either
- Put it in project storage and direct them to get it there
- Label it with the name and put it in lost and found. Sheets of wood can be slid behind the shelf so that it is not so easily noticed