People often react to different kinds of situations. Sierra interpret the police response to the shooting as she did see the police looking bored when they were keeping people away, as if the shooting does not concern them or did not matter to them.
This is also known as personal view, attitude, etc. It is regarded as the judgment or estimation made by a person concerning an event or situation.
Conclusively, Personal views are known to contain some bias and they differs from person to person as in the case with Sierra.
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