Resolve a hammer my ass!
Susan had given Brian a way to clear his suspicions from the get go.
As a law enforcer with considerable authority, when dealing with an uncooperative murderer during the enforcement process, wouldn't it be justified if the suspect got shot and killed?
Now that Brian held an official position with NW, continuing to sneak around and disguise himself to kill murderers was downright ridiculous.
He could legally kill people and fulfill the obsession of the deceased.
He hadn't done it that way before.
But that was just because there was a rush to close the case of the food truck explosion.
The real challenge was that investigator with glasses, Karen.
Brian was somewhat conflicted about how to get rid of the investigator named Karen without suspicion.
...
Direct attacks are easy to dodge, hidden threats are difficult to defend against.
With the ability, Brian didn't like leaving threats unaddressed.
