How many police killings of blacks and non-blacks have there been in 2014 compared to previous years?
It's probably too early to get stats on 2014.
44% of people killed by police (1980-2012) were white.
http://www.boulderweekly.com/article-13690-deadly-force-in-black-and-white.html
And the data in the above (and often cited) 'research' is admittedly flawed (the researchers were trying to make the case that black people are 21 times more likely to be killed).
http://www.nydailynews.com/opinion/john-lott-dangerous-distortions-cops-shooting-black-men-article-1.2030545