Von Boeselager was the last of those who plotted to kill Hitler in 1944. He was one of those who, along with the more famous Col. von Satuffenberg, tried to kill Hitler with a bomb in 1944. This is often referred to as the July 20 Plot.
Von Boeselager provided the explosives for the briefcase bomb Von Stauffenberg used. As the article states, he was well positioned to acquire them, and do so with out notice. The real interesting bit, is where he was ordered off an assassination attempt because Himmler would not be at the meeting.
I really need to find the FAZ interview. I’m sure it will provide a fascinating insight into that era, and those involved in trying to over throw Hitler.