Some battlereports that show how bad he was :

http://battlelog.battlefield.com/bf4/zh/battlereport/show/1/924280430745822400/1895128051/ 0K18D

http://battlelog.battlefield.com/bf4/zh/battlereport/show/1/924449447597536512/1895128051/ 10K21D 0HS

http://battlelog.battlefield.com/bf4/zh/battlereport/show/1/924861101751820544/1895128051/ 10K29D 0HS

In my opinion , these are the battlereports after he rage-toggled :

http://battlelog.battlefield.com/bf4/zh/battlereport/show/1/927364324486796800/1895128051/ gets 15 headshots out of 19 kill with AN-94 

http://battlelog.battlefield.com/bf4/zh/battlereport/show/1/925572439056315392/1895128051/ 108K 95HS (with CS-LR4 but still kind of suspicious)

http://battlelog.battlefield.com/bf4/zh/battlereport/show/1/925564914403384896/1895128051/ 41K 36HS (with CS-LR4 too)

http://battlelog.battlefield.com/bf4/zh/battlereport/show/1/926370661272672128/1895128051/ Extra battlereport shows his "skill" differs a lot compared to his performance in the past on not only locker but normal conquest maps.