I am so sorry for your loss and for the problems that have resulted.  The PR is a fiduciary of the estate and holds a fiduciary duty to all of the heirs as well as to the decedent's intentions.  It sounds here like the PR breached their duty.  I would contact an attorney to review the estate and what happened and help you figure out your next steps.  If there was a bond then you may be able to go after it.  Good luck.