This is a great thread - I think investors should all have their own must follow steps every time they see an ICO that is interesting, follow a couple links, check for copied content, check for fake or edited team members, etc, etc
If the photo was edited, then always less confidence. You can check how the photo was edited.
http://imageedited.com/Thanks mate. Saved this link, I've only used google images search back in the past to check for fake/stolen team photos.
I don't have a specific tool I use, but more so a piece of advice - A lot of ICO's nowadays use fake advisors, and they often put random advisors there that actually have nothing to do with the project. Google and find the advisors, and if you can't find if they are involved in the project, DM them if your bothered, or just give up and assume it's a scam.