Firstly, you are not wrong. As a matter of fact you are 100% correct. But....
When Mr. Murphy's lawyer is negotiating with the Crown prosecutor (a point in time referenced by my potatoes and back-bacon canadian slam) what would you imagine his posture would be?
Given 1: He knows his client is a dumbass, and has stumbled his dumb ass into a potential world of shit.
Given 2: He also knows (and knows the prosecution knows) that the evidence (which we both mention above) seems to indicate that Mr. Murphy is simply a dumbass, and not a terrorist.
Given 3: The fact that the contract security people let the kid fly indicates that they did not know the thing was a bomb. This is embarrassing.
Given 4: The 'contention' that the security people tried to give the bomb back to Mr. Murphy allows us to infer two more things... 1. It would be further proof that the security people did not know it was a bomb (embarrassing), and 2. It would be further proof that Mr. Murphy was just a dumbass, and not a terrorist.
Givens 1 & 2 are the ones that are spoken about over the traditional canadian meal described above.
Givens 3 & 4 - while unassailably valid considerations - are not spoken about over that same meal. Because this is not the right forum for Givens 3 & 4. Because there is no need for them to be spoken about - if both parties recognize the benefits (to both parties) of not speaking about them.
Now, Given 3 will most certainly be spoken about. But that is coming later once the 'fact finders' get done finding their facts. Various heads will begin rolling shortly thereafter.
But Given 4 is the elephant in the room that nobody ever wants to acknowledge.
Mr. Murphy, et al. certainly does not want to provoke the elephant by telling it that it is only standing on 3 legs instead of 4 - as long as Mr. Murphy and the elephant have an agreement that the elephant will not kill him, but instead, will let him leave, not dead.
The Crown most certainly wants Given 4 (whether true or not) to simply go away. This may not be possible now, as shown by our last many posts. :)