This question was not about Brady, it was about the train aviator.
Sorry, my bad.
However, that doesn't fundamentally alter my earlier post. You should never voluntarily cooperate in a situation where you're a potential suspect without legal counsel.
Allow me tell a story that happened to the child of a neighbor several years ago. The child, let's call him/her C, was a jr. in high school with aspirations of attending one of the military academies. C was an honor student who had never been in any trouble. I was home one afternoon when the police arrived at C's house after school. Knowing that C's parents were at work I wondered over to see what was up. I was promptly approached by a cop and ordered to remain on the sidewalk while his partner went to the door. I heard the cop at the door ask C if he could examine C's cell phone. I attempted to intervene to tell C not to do so and was swiftly threatened with arrest. C retrieved the cell and handed it the cop who began "fat fingering" it.
It turned out that a bomb threat had been called into the high school from that cell phone. C was arrested and the local DA announced that C would be charged as an adult and facing 5 years in federal prison. C's teacher came forward to claim that C had been in the lab at the and couldn't possibly have made the call, but neither the DA or C had a slam dunk case either way. The DA finally offered a plea deal that allowed C to plead nolo contender, which resulted in probation, but C lost any chance to attend the military academy. A few months later a few students came forward to report that another individual, I'll call them J, who had been released from juvenile detention only a week prior to the bomb threat, had confessed to them that he had made the call and C had taken the fall. I explained to these fellow students that he had simply been walking by the classroom, noticed that it was empty, but spotted several backpacks, including C's. Upon spying C's cell, J simply saw a crime of opportunity and called in the bomb threat. Sadly, the DA and police having already 'solved' the case refused to take any action.
The moral of the story is don't cooperate without the advice of legal counsel. If C had refused to provide their cell it's possible that DNA evidence could have revealed the fact that someone else had used the phone.
And yes, this a true story that happened to a high school friend of my son.
I'm traveling and typing this on my phone so forgive the typos.