Sitting there with that certificate, I remembered something I had not thought about in seven years.

Three days after the crash, a grief-support volunteer had come to my house.

Her name was Evelyn Hayes.

She had made coffee, and answered my phone, and organized documents while I could barely form a sentence, and she had been, in that shattered week, a kindness I did not know how to repay.

And at some point, gently, she had asked me for a simple mouth swab. Just a standard safety procedure, she had said, in case we ever need to confirm something later. I had given it to her without a second thought.

I had never once wondered what became of it.