ONLY if I get to decide who lives and who dies.

The fella had a particular reason to hate/love/revere Boyd and his kin. It doesn't matter what he feels; only that he has a particular reason to have a strong emotion regarding the Crowders.

Once he's slinging dynamite, he's fair game.
Go back and watch the episode.
Boyd's running up the hill.
LEO sees him. "We got a runner!" and fires at Boyd.
We see Boyd running (looking up the hill)
-at that point, I do not recall Boyd firing - if I'm wrong, I apologize -
Tim & other LEOs begin firing.

That's called promotion via 'dead man's shoes."

The ONLY glitch in the entire series, for me, was the substitution of California pines for Eastern US hardwoods. I was raised in Appalachian backwoods and every outdoor location shot grated on me like a sandpaper condom.

You dragged my family's good name through the mud, defiled my baby sister and sent me into the depths of ignominy and degradation. I ended up lower than a sea slug's asshole.

Only to ten, Mudhead.

Advancement via 'dead man's shoes.'

With all the asshole cops and wanna-be cops in the news for shooting melanin-enhanced persons right and left, I feel that the universe is trying to harsh my bliss and enjoyment of "Justified" and police procedural novels.

So it there the possibility that Vasquez has been corrupted by Markham? Maybe this isn't even a plot point to factor into the last two episodes but it does explain why he's so strongly working at cross-purposes against Raylan.