This player had normal stats, but his kills were almost all headshots + it looks like an aimbot
Here is a video of him:
And I would look for his friends with NOOB tag too, their stats are suspicious. Especially player named: zero_two
links for stats:
Panda BF4 Stats - Nice_Drug_Bro - Panda (pandazlo.com)
Panda BF4 Stats - zero_two - Panda (pandazlo.com)