hacker   wallhack   aimbot

http://battlelog.battlefield.com/bf4/zh/battlereport/show/1/1042057312895485760/1762300600/

He was fishy to me as well. 

https://bf4db.com/player/1762300600/snapshot/16748

44% HSKR on L86

http://battlelog.battlefield.com/bf4/battlereport/show/1/1043998936174654400/1762300600/

57 Kills, 27 headshots with L86. 

http://battlelog.battlefield.com/bf4/battlereport/show/1/1044219151235728128/1762300600/

45 kills, 22 HS with same gun. 

Lots of reports like these on bf4cheatreport, I can post more if need be but I figured these would be enough.