obfusciatrist, that is an interesting question. I do not know actual police procedures for such an event, but imagine people working deep cover have faced similar situations before - been involved with or near where a death has occurred. I do not know how those situations are handled.
I’m fairly certain that agents/officers are not supposed to kill an innocent or allow someone to be killed if they can stop it - protecting their cover does not trump murder. However, there are likely situations where their cover is blown and they have to kill in self defense.
This situation, the officer started a house fire to establish his credentials, only to find out later there was a person in the house - probably tied up. I would imagine in real life, there would need to be some debriefing of the incident - how did he not fully check the scene, etc. As far as the circumstances of this show, there are only three people in the know on the cover identity, because they can’t trust even the police officers to keep it secret - they don’t know who within the agency might be corrupt, and the main criminal they are after is a government official, with lots of types of pull. I can accept for the sake of this show, it is too risky to pull the guy in for a formal debrief. So the debrief occurred by Wysocki chewing him out, then the second round at the station.
If he had elected to come in, then the Superintendent would have likely had a formal debriefing, etc, over the incident. Also, I think it does make sense that she is informed - if and when the takedown ever occurs, it will come out that the undercover agent performed numerous crimes as part of his cover. Certainly a manslaughter as part of an arson will be high on the list - as shown by Gibbons’ blatant move with the visit to the grieving family. She absolutely must know about the incident and sign off on it for any future prosecution based upon the agent’s testimony to stick.
As I see it, she evalutated the situation (Wysocki certainly discussed it with her) and put an accidental manslaughter where he was set up against the value of his deep cover and likelihood to get anyone that far into the program again. It was a year in undercover work to get that far, and only now getting to the point that he has any contact with Gibbons, nevermind actual dirt on Gibbons yet. And it’s clear he was set up - though he certainly was negligent in searching the premises after the other guy prepped him and left, it’s not like there was a kid playing in upstairs - he relied on being told the house was empty and not seeing or hearing any counter indications when he entered. The victim was going to be killed. It’s a case where he made an error and should get a demerit/demotion, but will have to live with that, which is likely enough of a punishment. Plus, it is hoped that will put his alert higher and his incentive stronger.
Interesting question - what should he have done if he found the guy before he started the fire? Set him free, and then report back there wasn’t supposed to be anyone there so he didn’t think he was to kill him? Play dumb, and when they ask deny finding the guy and setting him free?