The written report was never made public ( to my knowledge at least , but it is over 10 years now, if someone knows of it I would be for one very interested to read it )
Both aircraft were military, so the investigation do not fall under ICAO , and Annex 13 recommendations do not apply here .
There only was a joint satement by USAF and GAF end of March 1998,and a verbal briefing done in Bonn by the GAF for the Press end March or early April 98.