TASK DEFINITION: Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title
PROBLEM: So, this question is not really about the series the Mentalist, but I think it fits here anyway.  First, I am not from US, so I dont know if CBI really exists or was made up only for the series.  In the series Wayne Rigsby and Grace van Pelt have an hidden relationship because it is not allowed at CBI. Everybody warns them to keep it a secret, because otherwise that would have consequences and one of them would have to leave the CBI.   Is this really a rule at CBI or similar American criminal bureaus? What is the reason for this rule? In Europe I have never heard of such a rule, as far as I know relationships are not forbidden here when working together in a police-like environment.

SOLUTION: Is it forbidden to have a relationship in CBI in reality?

PROBLEM: In Mystic River, Sean and Whitey don't have a clue about the real killers of Katie until they finally listen to the 911 tape. Sean notices that the caller refers to the victim as a she, although he couldn't know that the victim is a girl since he saw only the car and the body was dumped in the park. This tells Sean that the caller probably knew more about the case - but how did they make the connection to Silent Ray and his friend Johnny? Not once in the movie do we see them being in contact with the police and they didn't give their names either...

SOLUTION: In Mystic River, How did listening to the 911 tape solve the case?

PROBLEM: In the Hollywood horror movie It(2017), which is based on a novel by Stephen King, the young girl Beverly who stays with her abusive father is shown as cutting her hair in front of mirror.  Why does she do this?  What is the significance of this scene? I want to know if I have missed out any other significant detail related to the scene.

SOLUTION:
Why Beverly cut her hair?