Seen this retouching technique done before. This photographer uses the same technique in each photo. Yes, they do typical retouch and use lighting, but there is this specific technique that they do to make the image...slightly darker, I guess? Any ideas?
(Photographer Radiant Inc)
https://scontent-b-sjc.xx.fbcdn.net/hphotos-frc3/251809_471578822901766_363712665_n.jpg
https://scontent-b-sjc.xx.fbcdn.net/hphotos-ash4/s720x720/422146_314443911948592_56645473_n.jpg
https://scontent-b-sjc.xx.fbcdn.net/hphotos-frc1/s720x720/484625_397189903673992_63232003_n.jpg
https://scontent-b-sjc.xx.fbcdn.net/hphotos-ash4/s720x720/308015_206924276033890_3278436_n.jpg
(Photographer Radiant Inc)
https://scontent-b-sjc.xx.fbcdn.net/hphotos-frc3/251809_471578822901766_363712665_n.jpg
https://scontent-b-sjc.xx.fbcdn.net/hphotos-ash4/s720x720/422146_314443911948592_56645473_n.jpg
https://scontent-b-sjc.xx.fbcdn.net/hphotos-frc1/s720x720/484625_397189903673992_63232003_n.jpg
https://scontent-b-sjc.xx.fbcdn.net/hphotos-ash4/s720x720/308015_206924276033890_3278436_n.jpg