Yes, the fact that a cop took 11 minutes to report a shooting is significant because cops are trained to get someone help immediately. This cop clearly did not care if the person lived or died. Blood is on this cop's hands because he had the power to save someone.
Reporting a shooting should be immediate but if a cop waited that long, there was something awry going on. He or she may have been thinking about how to cover it up or how to justify it. They were only thinking of themselves and how they could possibly be implicated in something crooked.
11 minutes is a very long time to report a shooting. There are a lot of things that he could have done in 11 minutes. The police in this country have gotten out of control. They do whatever they want, whenever they want and almost everyone is powerless to stop them.
No, it is not significant that a cop took 11 minutes to report a shooting, because it is not clear what else might have happened during that time. It is possible that the officer was trying to save a life or taking care of other emergency procedures. Law enforcement officers do other things than just report crime.