They can tell what time you've killed a player by the exact seconds since the game started. Yeah you're not going to kill a player within 2 seconds of the game starting...nice try though. Most maps are 10+sec across base.
Whilst you would've thought they'd monitor certain things like this or at least make certain catches in the code to log early kills on S&D, but no.
They haven't surprisingly and despite Z8Games team of 30 people (I think, it's what i've heard at least) they fail to check this resulting in hackers going undetected for quite some time Seeing as the report team is slow as fuck.