Hi guys,
so i watched episode 13, but still can't understand the relation to the ending of episode 12.
I mean they don't show how did Rigsby manage to get out of the dark place where Ardiles was killed. 
And then, I don't get it, is the creepy warehouse, at the end of episode 13, with Laroche, the same place where Ardiles was killed??

Can someone please explain to me, what's the relation?

Thanks