Heard a discussion on the radio yesterday. Noor was poorly viewed by the other Cops in his unit. He was "fast tracked" by the Mayor because they wanted to have a Somali-American on the force quickly. Their city has a huge Somali-American population.
Fast-Tracking apparently meant Noor was "helped" through his training more rapidly than other cadets. Not that he was a fast learner, but just the opposite. The other Cops saw him as a risk.
The fact that he was paired with a very young and not-well-seasoned partner was also brought up. The Cops choose their partners in order of seniority, so the more experienced Cops get first dibs. All the more senior Cops picked other partners. Noor's partner basically got stuck with him, being he was "last to choose", like on a school baseball field.
So, bottom line: Noor was a "token" Somali-American Cop, pushed through training before he was really trained, had a reputation with the unit as a liability, and was partnered with a Cop who had not much more experience than he did.