I am suspecting Stefl which I admit was wrong.

 Stefl was right. Stefl death was the key and no one listen. >_>

OP is updated: Masons + Cop(even if paranoid) + Watcher + Bus-Driver VS 2 mafia(one of which is a Jailkeeper instead of just Blocker) is just cruel! And I won anyways :D

Wut...?
Linkz can block and kill?

Wut...?
prof can ensure he never dies at night?

I was right suspecting you. I really have a strong feeling on day 3.

You were right, but your reasons were still pretty bad. Grats on being the only one to really suspect me though!

Night actions

Night 1
Prof (Bus Driver) :  Prof and Spurge
Stefl (Paranoid Cop) : Linkzmax
NoCtiS_NoX (Watcher/Reporter) : Baalzamon
Linkzmax (Jailkeeper): Stefl
Mafia (Linkz): Kill prof

Result:
Stefl sleeps in resting chamber (No result)
Linkzmax kills spurgeonryan
NoCtiS sees nothing

Night 2
NoCtiS_NoX : Watch Wonk
Stefl: Scan Prof
Prof: Switch Stefl and Linkz
Linkz: Jailkeep Prof
Mafia (Final-Fan): Kill Stefl

Result: 

Prof is blocked, no switch.
NoCtiS sees nothing.
Stefl dies.

Night 3
NoCtiS_NoX : Watch Radishhead
Prof: Switch Prof and Wonk
Linkz: Jailkeep Prof
Mafia (Linkz): Kill Wonk

Result:
Prof is blocked, no switch.
NoCtiS sees nothing AGAIN.
Wonk dies.

Night 4
Linkz: Jailkeep Prof
Mafia (Linkz): Kill Radish

Result:
Prof is blocked, no switch.
Radish dies.

Damn... all my money was on prof... damn... I feel so fucked now that I know that linkz was the jailkeeper and FF even hit me with a stick on the head about: "Why he is no jailkeeper, but a blocker, if he is the blocker"

Weighted Companion Cube + Wheatley scumteam was unexpected.

That's funny. I had the stasis bed in mind as my fakeclaim.

My original Mafia team was Cave Johnson and Caroline but I realized that given the very few characters available in the Portal universe I couldn't have the roles align with characters so I switched it up to prevent the end of the game by a massive name claim.