Étienne

Étienne is not a passenger, but instead someone you chat to during your investigation. You can visit him at his apartment during the Angel of Death story. You can gain access by reading the Killer Case file given to you by Busset (May also be Police Victim File 1).
It appears to be located on the top-left of the map. *Unconfirmed if this is random or not*
== Transcript ==
You park in front of Étienne’s place and turn off the ignition. You’ve known him for… years… Actually, since your first day behind the wheel. He was a skinny teenager you picked up late on Sunday nights to take back to his boarding school in the distant suburbs. It was well paid, but depressing. Étienne has since become a friend. And he’s got intel on one of your suspects… Jonas Piersson. … You knock on Étienne’s apartment door and he comes to open it. He’s now a muscle-bound giant who towers over you.
Étienne: Come on in… don’t look at the mess.
He talks quickly and his voice is a touch colder than usual. Something’s not right. You walk into his pristine apartment… oh wait, there’s a gym towel lying on the designer coffee table.
« Yeah, total pigsty. »
« You ok? » ***
« Nice place. »
(Say nothing.)
He collapses on the couch. His attitude makes you want to stay standing.
Étienne: You’re in deep shit…
Houssine: Huh?
Étienne: That guy you asked me to tail? I know him. Everyone knows him.
Houssine: Jonas?
Étienne: He’s famous. He’s like your equivalent of…
He waves his hand at you.
Houssine: There are no famous taxi drivers.
Étienne: Fine. Well, he’s famous. Like really famous.
« What’s so special about him? »
« So what? » 
« What’d you find out? » ***
Étienne: Oh! Right! You’ll see, it’s fascinating.
Your friend clears his throat. You glance around and realise this young man must earn more in a day than you do in a week. If not more.
Étienne: This simulation theory has recently led to the formation of several groups… extreme believers, you might say. Groups that want to test the theory. [CLUE]
Étienne: Or rather, who want to prove it’s true.
Houssine: But how?
Étienne: By crashing the system…
He stands up and starts pacing.
Étienne: Jonas is the leader of one of these groups. [CLUE]
« A terrorist? »
« You think he could kill? » ***
« All that just to prove a theory? »
(Say nothing.)
There’s not an ounce of doubt in his voice when he say…
Étienne: Kill…? Yes. No doubt. If it would prove his theory.
Étienne leans over to you. Every one of his arm muscles is flexed.
Étienne: I don’t know what you need this information for but… watch your back. Jonas is no altar boy. He’s nobody’s fool. Not your average nerd. [CLUE]
Étienne: He could be dangerous.
… A few minutes later, you’re back behind the wheel of your car. You feel uneasy. All that is over your head. Simulation. Internet. You barely know how to use your phone.
Houssine: Come on…
You shake your head and start the cab. You’ve still got plenty of fish to fry.