Mark Middleton fought to keep the man who murdered his stepdaughter, Karla Cardno (inset), behind bars. Photo / Mark Mitchell

Warning: Disturbing content

For decades, Mark Middleton fought to keep the man who murdered his stepdaughter, Karla Cardno, behind bars.

But two weeks before Paul Joseph Dally’s recent appearance before the Parole Board, where he was denied parole for a 19th time, Middleton died.

Mark Middleton died shortly before Paul Dally reappeared before the Parole Board for killing his stepdaughter. Photo / Mark Mitchell

The 69-year-old died in the