I just don't see how this could've been properly handled any other way. As you say many different groups wanted an answer and the DND wasn't providing 1 right away. There was some suspicious things about the injuries mostly that they were very similar between the 3 detainees. Combat was 1 explanation but because they were so similar intentional harm was also an option. The investigation cleared the air and found that nothing wrong happened. There will always be people against the armed forces but in this case it wasn't a completely unfounded investigation. How would you have handled it? Ignoring the questions would've undermined our forces here and in Afghanistan more than having an investigation.