I am surprised that the Guardian did not do this graphical analysis themselves. My analysis below shows the quite a few people were unarmed but many more were carrying guns, knives or other weapons.
Source: The Counted: people killed by police in the United States in 2015 – interactive | US news | The Guardian Accessed 1 a.m. New Zealand standard Time 15th September 2015.
You have to read through every individual data entry to work out how many of those killed had guns, and the many of these were shooting at police when they were shot dead. The same legwork is required to find out how many officers are on murder charges after killing civilians.
Utopia, you are standing in it! 
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