Since you don't have it, make an account in your Xbox, no need to make it silver, just a live-less one, go on customs, kill it, and take the screenie. We need some sort of proof.
I wish I had taken a screenshot of one time about a Year ago. I was owning with an overkill and I got taken out with a magnum from behind.
On my screen it said.
"You were killed by 'A Black Person'"
LOL I'm not racist so please dont say I am. But I thought it was really funny.