Yeah, I was here (as you can see in the picture) and I can't really say if it was intentional or not. Random Pizza Guy said Conqueefador hit him several times in the back, and Vesarius says there were no enemies near by. But, the logs show that he killed people before and after the teamkilling.
I hope Random Pizza Guy can post the screenshots he took, since they'll probably unveil the truth a little bit more.