von Braun never said any of those things. It's just made up crap meant to influence public opinion. That anyone takes such conspiracy twaddle seriously is hard to believe.
However, the following is real. :') In one of the (previously unpublished) photos taken of the infamous debunking press conference, General Ramey was holding a memo or telegram or some other sort of typed document.
http://roswellproof.homestead.com/Memo_HiRes_600dpi.html
David Rudiak used various techniques to clean up the image, and found the phrase "victims of the wreck" among other things. Here are links from MUFON:
http://www.ufomind.com/people/j/johnsonj/ (about J. Bond Johnson)
http://adm2.ph.man.ac.uk/ (Main Link to Debris and Memo)
http://adm2.ph.man.ac.uk/ftw-pics/index.htm (Ramey Office Photos)
http://adm2.ph.man.ac.uk/ftw-pics/new-1/index.htm (Memo)
http://adm2.ph.man.ac.uk/ftw-pics/new-1/rmysignl.htm (Memo)
http://adm2.ph.man.ac.uk/ftw-pics/download/index.htm (2.5 meg image scan a BIG file)
http://www.abduct.com/aaer/n52.htm (Symbols In Debris)
http://www.abduct.com/aaer/n53.htm (Symbols In Debris)
http://www.artbell.com/jbjohnson.html (Ramey Photos & Symbols)
http://www.geocities.com/Area51/Hollow/8827/ramey.html (Memo)
http://www.abcfield.force9.co.uk/rpit/letter.html. (Thanks to RPIT and Dr. Bond Johnson)