This guy czexman is possibly using wallhack. i noticed many times doing the same thing. 

As you will see on the video below i was using mortar on a place that i couldnt be spotted and he through his ucav exacly where i was. maybe you will say that he guessed where i was. i will tell you that he did the same thing many other times on different spots even though he didnt know where i am cause i know that i am on my base and the wasnt enything like a mav or enemy near me to spot me! i can make some more videos if you arent convinced of what am talkng about.i am playing this game since day 1 and i was admin on many servers so trust me when i say that i couldnt be spotted on the spot i was staying.

https://www.youtube.com/watch?v=EEP9JjIaCaE&feature=youtu.be&ab_channel=Vibration

There is a searchbar where you can search for the player you want to report https://bf4db.com/player/328670887 and there is a beautiful and virgin Report botton on his Profile.. 

This section is for reporting players that are set as clean.