It's called love in first sight
I get the vibe that he's got a bad case of 'hero worship' or something along that line directed towards the player's father, like when he says he could never call 'the son of Yorke' by first name.
That line in particular set off MASSIVE warning bells in my head, like he's either buttering up the player to get something in return, or else only showing the player such respect to get in his father's good graces.
You stole the words from my mouth! I get the feeling it's an issue with interpretation and writing, considering the fact that he's a selectable route, but regardless, I get major bad vibes from Pierre, from the obvious infatuation and the potential ulterior motives, I wouldn't trust the dude with a dollar, much less my freedom, authorized by the police or otherwise.