The Agatha Christie school of reasoning;

There reports didn't make sense until you read the final paragraphs. Then the authors introduce the `hidden' fact that caused the accident.

The Holy Grail school of reasoning:

These reports form a conclusion so strongly that they spend millions of pounds in trying to gather evidence to prove a hypothesis. They often fail to prove them but by this time so muh money has been spent on forensic tests that no other hypotheses are considered.