Warning do not add this person for trade, he has been stealing profile pic of many reputed users here, Please block this user, If this person adds you, you are at risk of getting scammed.
Note that his steam64 ID is same and he changed his custom url / steam name and profile pic, he has also mentioned the person he impersonated sg profile on his steam profile.
UPDATE: He has been banned by FoG (Fortress of Gamers) also mentioned on Steamrep
Impersonator:
| steamname: Mohsin
| steam3ID: [U:1:339517376]
| steamID32: STEAM_0:0:169758688
| steamID64: http://steamcommunity.com/profiles/76561198299783104
| customURL: http://steamcommunity.com/id/Mohrsin
| steamrep: http://steamrep.com/profiles/76561198299783104
Now he is Impersonating this user
https://www.steamgifts.com/user/Anomalocaris/feedback
http://steamcommunity.com/id/ommateum/
Impersonator:
| steamname: Anomalocaris
| steam3ID: [U:1:339517376]
| steamID32: STEAM_0:0:169758688
| steamID64: http://steamcommunity.com/profiles/76561198299783104
| customURL: http://steamcommunity.com/id/AnomaIocaris
| steamrep: http://steamrep.com/profiles/76561198299783104
Warning do not add this person for trade, he has been stealing profile pic of many reputed users here, Please block this user, If this person adds you, you are at risk of getting scammed.
Note that his steam64 ID is same and he changed his custom url / steam name and profile pic, he has also mentioned the person he impersonated sg profile on his steam profile.
Screenshoot of his name changes,