Hi Joel Palmer,
The RadTreeViewItem can have only one parent. So if you want to represent the situation where person reports to several people you may duplicate that person and set it as a child to every one that it reports to. Of course you may need to do some changes to your data model depending of the view point you want to represent. Meaning that when you want to list all people you should remove the duplications, but when you want to represent a hierarchical organizational chart you may need to duplicated some items.
Hope this helps. Please let us know if you need more help.
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