Spencer, Emily, Hotchner, Rossi, Morgan and JJ were out in the field on a case, Penelope was, as usual, in her office at the BAU building as she's the tech expert, feeding information to the others

The Unsub was a man named David Hugg who was a spree killer, he managed to catch JJ off guard and had a gun to her head

You were on the case with them working as a sniper, long distance support, you took the shot and the unsub was down, JJ was safe

Hotchner: Through comms Nice shot.