I was playing on YIGR locker only server and came across this player who killed me in ways I could not understand several times.That's when I decided to leave the game and watch her play and found this which looked suspicious to me.She got kicked and I think she instantly  changed her username

She also talked about having multiple accounts

server link:  http://bf4stats.com/s/pc/894ac35a-b497-480e-a343-48e03d4a26bd

video evidence : https://www.youtube.com/watch?v=qk2VuYlpBHQ&t=6s

Link to the battlereport of that round?

sure let me send

http://battlelog.battlefield.com/bf4/servers/show/pc/894ac35a-b497-480e-a343-48e03d4a26bd/YIGR-WAR-HELL-only-LOCKER-25-7-www-yaigrovoy-com/

Edit: Nevermind, found it by myself.

http://battlelog.battlefield.com/bf4/zh/battlereport/show/1/980126207023675328/1955923539/ 

Yep. This guy is hacking, and he's already banned on BF4DB.

https://bf4db.com/player/1955923539

http://battlelog.battlefield.com/bf4/zh/battlereport/show/1/980126207023675328/1955923539/ 

325 shots hit, 104 kills, 67 headshots on a 100HP server. This is already enough evidence to me.

Next time remember that you can get a player's name or persona ID via the battlereport, search it on BF4DB and report him by clicking the REPORT button on his profile page.

Thanks .I tried but I couldn't find it. Did you manage to find his/her username?

Battlereport = 

http://battlelog.battlefield.com/bf4/battlereport/show/1/980126207023675328/1955923539/

http://battlelog.battlefield.com/bf4/soldier/IIIGAMERGIRLlll/stats/1955923539/pc/

that person is already banned by BF4DB 

the server probably does not use the BF4DB plug in