But the opportunity for them to try to do so is/was always there.
She bothered to write a book, and a TV company used it as inspiration.
Folks can hardly complain with 'A TV company chose to take HER book as an inspiration, when it's totally biased and littered with flaws'.
Should have written a less biased and less flawed book then!
You're missing the point. Her book is a Godsend for anyone with any clout in influencing commissioning, from the perspective of hammering home a certain view of the case. In the end, the view that will be pervasive among the majority of viewers, is the one where the police messed up; the relatives helped them put it right; and the nasty man is caught.
You might as well go back to 1993 and air the effort that was made then.
If somebody writes a book about every aspect of corrupt practice in the case, it's not going to get commissioned in to a program. In other words, the people with the clout are like 'The Man from DelMonte'.