next time u got 3 options:
1.- if u are legal steamer, u can take ss with F12
2.- also, press PrintScreeen key, then open Paint program, and press Ctrl+V, to paste the pic. after all this u can save the file and post here
3.- a 3rd option is: open console, enter "record name", without the "", and instead of name, hacker´s name to remember, so: record Gl, on console. this will start a demo and enter "stop" for finish. CS will save this demo in ur cs folder. so u can send here too
just a question, how u take proofs from CSGO before ban a hacker ?¿