This is a big no-no. Don't go there. If someone kills an elite/antag, that's their aleph, they've won, not yours. For example, when you see a team mate in a CQC animation, STAY AWAY. If a teammate decides to sprint past you at that precise moment they're doing the "sorry I didn't mean to" when they perfectly did.
The minute a teammate does that DELIBERATELY as well as hang about like a bad smell, that's an instant game quit. Respect your teammates and NEVER steal their aleph, ever.
Now, the devs could easily rectify this problem, by simply giving it to the winner of the CQC, but no they won't do that. They think it's far better that teammates steal it or elites while finishing the kill animation, or have you running around in circles for a couple of seconds wondering where the **** it is.