Without identifying the victim, we should work out the timeline a little on Jordin here.
I have Jordin saying he turned 18 on 7/31/2015. So, if Jordin had sexual relations with someone under 18 past midnight on the evening of 7/30/2015 going into his birthday, that would be considered rape.
Now, I suppose Jordin turned 19 on 7/31/2016.
Chief Keef played a show with the Glo Gang in San Francisco at Social Hall SF on October 7, 2016.
So, the timeline of everything at least one of the victims has claimed is making sense so far...