Would love to have actual confirmation on this....

How exactly would one confirm this without putting this agents life at more risk? He tried using anonymity as a line of defense to let us know what happened. They are going to try to kill him anyways the least he could do is give light on the situation.

Someone took the kill shot.
The team definitely waited a long period of time before doing so.
Don't be surprised if both members of that team end up dead.
Clowns clean up their messes . They don't want anyone talking. Kill the target and then kill those who were given the target is basically policy now.