"..Is it possible, therefore, for an innocent person to be in...

"....Put simply you can't just assume someone is guilty...."

Guilty of what? There needs to be something specific they are being accused of, which comes back to the legal process as per the article.

"..Is it possible, therefore, for an innocent person to be in jail or does the conclusion of the case render that status invalid?..."

There would be no presumption of innocence if they have been convicted and gaoled.

If the courts have ruled they are guilty, then the presumption of innocence is no longer required, as per article 14(2).

If they are wrongly convicted, then that is a different issue.


"....Is it wrong, in your opinion, for the ABC to refer to Lindy Chamberlain as 'an innocent woman' years after her legal process concluded?..."

They can refer to her however they want, it is called an opinion.