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.

Player was correctly reported after and then set as clean. Closing thread.