How does Google choose the photo added above a Google+ result?

[LocalEnthusiast]

When I do a brand name search for a client, it pulls their G+ info into the right side bar and it adds three images above the G+ info. One is a photo, one is the Streetview, and one is the Google Maps results.

On this particular client, the photo being pulled is from Google Images and not from the G+ page. Their G+ page is verified and has 17 photos in it, none of which are this particular photo.

Please advise.

[Vettyy]

I couldn't say why exactly but I believe that:

The photo might be from a website that's quite popular and Google thinks it's a better image? 
Have you uploaded the correct photos? for example, some people use their profile photo to place a photo of their logo instead of what's actually meant to be there (an image of what they're service is about).

I would go back and look at the example's in Google My Business Listing and make sure you've uploaded them correctly (or triple check) as well as your G+ page.

[LocalEnthusiast]

Thanks for the input. I double checked everything. I really think it is Google overriding the results because the webpage it is pulling from is highly shared and trafficked.