First scene: Set it up with the basics, like he's entering a base or something, hears gunshots and takes cover behind something (have him say some dialogue during the shootout, make it up if you want), then he's shot a few times in the chest and abdomen, slowly falling to the ground face up as the first-person camera zooms in on his body (while he's dying, have him say some dialogue, like he's challenging the killer to shoot), finally he's shot one last time in the chest, then slowly closes his eyes while letting out a groan. (If you can, show different perspectives of the corpse).
Fourth scene: Here she changes into her second outfit and returns to the scene of the shooting. This time, she sees the killer unarmed. She confidently approaches, saying he's finished and that she plans to kill him, but first, she plans to have some fun with him. The camera looks down at her. As she continues speaking, the killer quickly draws his weapon and shoots her in the groin, causing her to let out a loud, agonizing groan. The killer takes the opportunity to grab the gun from her hand as she clutches her wound and proceeds to shoot her twice more in the groin with both weapons, causing her to fall and die slowly.
If possible, include several camera angles when focusing on the corpses (like two or three), always with their eyes closed. Let me know if this sounds good, or if it's too much, we can adjust it to fit the budget.