Hands Up, Don't Shoot

I love this piece. I feel like your message is right on target and probably, unfortunately, still relevant in the future. The composition created by all the lasers and guns pointing at your subject achieves this. Also the details in the city, the equipment the police use and the vehicles give the feel of a well lived in, gritty, futuristic city.
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And my critique would be to push this composition a bit further.

There is not a lot of distinction between the foreground, middle and background. For one, all your elements share a similar color scheme (black and white). This also makes it harder to get the feel of depth or distance.

One remedy would be to make the background (the city backdrop) less saturated or less focused... like depth of field from a camera. The details are way to sharp and they want to compete with the foreground elements.

Also the main subject could be a different color than other elements. Let's say all the uniforms of the police and their vehicles are shades of black, while our main subject is wearing all white... or red. Or the police could have a more military look...

Compared to how the riot police looked like in Ferguson.

static1.businessinsider.com/im…

Another remedy, could be changing the lighting to focus more on your main subject. Heck, a soft, very diffused spotlight might work. While the main subject is well lit and his details are vibrant, all the other subjects outside him would be in shadow, their details slightly less evident.

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Anyways. All these things are easier said than done... rendering some elements separately and compositing them in Photoshop may help! But I love this piece. Can't wait to see what you come up with next.