For example I was playing Museum yesterday and I had 14 kills and 1 death about 2 minutes in and my squad member had 9 kills and 2 deaths. Then when I went to check the scoreboard about a few moments later after a good double and triple kill I should have had 19 kills but I only had 9! but my squad member had 19 kills all of the sudden! I know he didn't get those kills because he was close to me and every kill was fully counted to me. And there was no way he got 10 kills in those few moments since we were pretty much side by side and I saw the 2 or 3 kills he really got.
This kept happening on the next 2 matches we were paired up on. I sent him a message asking if he was hacking and he sent no message, instead he just left my squad and dissapeared from mp all together. I haven't seen him since but that was only last night so he might show up again tonight.
Anyone else have this happen to them? Really strange hack if you ask me but there is no doubt some of my kills were getting stolen and added to his score.