What does anyone think of this? I would say that exposing maladministration in the police force would have been a factor.By now any such police would be retired by now and their pensions unaffected. http://www.theguardian.com/australia-news/2014/oct/18/cold-case-arrests-two-men-charged-with-of-three-40-years-ago
Sometimes there just isn't enough evidence to close a case. If you read the article, new evidence had surfaced.
The mother somehow supposedly knew who did the bombing, so its not like it wasnt underbelly type stuff. Still, is all a bit suss, police at the time, a lot easier to pay some off that it is nowadays