His death was implied but is not positively confirmed on screen until "Smashed" (season 6).
It was tentatively identified as a Roman camp in 1949 although this has not been positively confirmed.
These occurrences (neither positively confirmed nor confuted by evidence) are as follows:
After bin Laden's identity was positively confirmed, President Obama announced the operation in a national address.
He went to bed, more pleased than otherwise, glad that his opinion of the attorney had been positively confirmed.
All three roles have yet to be positively confirmed.
The Bosnian soldier's report could not be positively confirmed, although armed men were visible in bunkers partly hidden in the snow.
Until-and unless-her death was positively confirmed, she would survive in his mind.
The perpetrator of these attacks has never been positively confirmed.
The bones were "identified" by his daughter and not positively confirmed by DNA.