Another role that would fit the kind of dirty flavour of Fallout would be a Coward. Someone who hides behind other people and if the Coward is targeted with a NK, the person he hides behind dies instead.
(might be Weak or Disloyal)

Cowards are for pussies. If I draw Coward, I'll hide behind myself.

Well, a non-weak and non-disloyal Coward could try to hide behind Scum...

And a weak Coward might breadcrumb behind whom he will hide next, thereby revealing Scum when he dies from targeting Scum.

I think the role has potential.

Sorry, I don't know much of the setting (shocking news, Fallout is yet in my "to-play" list) and giving ideas isn't my specialty. I'm one of the less creative guys you're ever going to meet.
If you need someone to scrutinize an idea punching holes on weak spots, I'm the guy for the job. But to bring new ideas to the table is a job for someone else.

The telepath looks interesting. The sniper makes me wonder... I think it might have the unintended side-effect of making the CSI clear everyone who visited the crime scene of a snipe victim in a single bout.

Bah, don't make me read the role list.

Only if he's a pussy.

I don't hide behind scum. I lynch them.

It does appear the Shelterer has too many complications. However I do like the concept.

I've seen/used the Neighborizer many times and like it.

The Telepath, Sniper and Coward sound interesting.

You do? Have you been playing mafia on some other site without us?

Oh shit!

Yes, if he has their DNA. That would be a shift in the usefulness of the CSI. On the one hand, he couldn't convict the Sniper by his DNA. But if any other person visited the crime scene at Night, that person would be mostly cleared. It adds a nice complexity. Without making the CSI imbalanced.

I decided I like the sniper!

Night Gambler: The gamblers love spending the nights playing games and they don't take no for an answer. They can randomly choose a target to play a game and that person will lose their actions for that night if they have any.

"Oh look at the time! The sun is almost rising." said the old man while looking over his cards.

This looks like it might be a terrific game with a well-beloved setting

Fits very well. Thank you!
So, are you going to play?

Or observe? Or be backup?

Oho

(╥_╥)