I wonder if Jimmy automatically knows it was Horvitz. Probably. Richard did seem to take it really hard. Given that he thought Jimmy had a great family life how will he process the revelation that Angela was playing house with other women? Who does Richard think committed the murders?
Doyle found he was in over his head.

I was a little surprised by Van Alden's "run for the border" move.

"When the snows fall and the white winds blow, the lone wolf dies but the pack survives."
Winter is Coming

Now this is the Law of the Jungle—as old and as true as the sky; And the wolf that shall keep it may prosper, but the wolf that shall break it must die.
As the creeper that girdles the tree-trunk, the Law runneth forward and back; For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack.