Sorry to bump this thread. My wife's family knew Greg Hollowenske, and I came upon this site while I was looking into more info about the exorcism he witnessed. My wife and I moved away from the area, and although she conversed with him through letters, I never did get to meet him (married 6 years now). Greg was a good family friend of her parents, sponsoring my MIL through RCIA, getting FIL into KoC, etc. So you can take what I say with a grain of salt, as I never did meet the guy.
That said, when I first started dating my wife she told me about Greg. Eventually she told me about the exorcism he witnessed one time (about a decade ago now) when we were on the subject matter. Greg had told my FIL about it roughly 30 years ago, but I dont think he made it a habit about going around telling people willy nilly, only close friends and family.
My wife tells me that he wrote his experiences down in a Journal type book, and she read it when she was young. Thats why I was googling good ole Greg, to see if somehow someone had photocopied that or not. I just asked my wife and she said its archived somewhere in the Church, but I dont know if that means Rome or just some parish somewhere.
My M/FIL speak highly of Greg, and when I asked them about this subject, they told me he wasn't the type of guy who would lie. Does that mean he might have? Sure, but it just didn't fit his personality. He was a very Godly man, the type who would go to daily mass and very involved in his parish, but again that doesnt necessarily mean it is 100% true. The way they talk about him though, and the way he helped their family, I dont think he made it up though. The fact that he told this story to other people before his deathbed kind of throws the whole medical induced craziness out the window though.
As far as the "Brother" thing is concerned, Greg wasn't a monk, which does seem to discredit his story to those on the outside. The link doesn't work anymore, did it just say he was a monk once or was it a reoccuring theme in the account he gave?
I am asking the family right now for some more info, as I havent talked to them about it in a few years.
*EDIT*
No he wasn't a monk. FIL says he use to refer to himself as Brother due to the orders he was involved in, and perhaps that is what he was getting at in the interview.