Escaping from the fate of a vampire

HE'S A COP AND SHE'S A KILLER

A lot of people think it's easy to be a vampire, to be able to bite people, to slip between heartbeats, to feel special . But the problem is that in reality, there's no real advantage being a vampire. Of course, not everyone will agree. If they had the chance, they'd jump on the vampire bandwagon, but they ignore that it's not as cool as it seems.

Alex: Hey babe, you feelin' right? Are you okay?
(I kept my head down; didn't want him to notice that my eyes were red.)
Jason: Hey, guys, I'm, uh, an old friend... Jason. Nice to meet y'all!
Olivia: Huh? She never talked about you.
Jason: Oh, well, that hurts. But hey, we need to go, right, Beth?
Beth: Yeah...
(They went through the woods. Beth pushed Jason away.)
Beth: What the hell are you doing here, Jason?
Jason: Hey, why you acting like this?
Beth: Yeah well, I'm not in a good mood right now. What do you want?
Jason: I can see that you've become a vampire now.
Beth: Huh? What the hell are you talking about? Bro, you've gone crazy?Why are you here Jason?
Jason: Oh, come on, we used to tell each other everything, you know you can trust me.
Beth: Yeah, I know, but things have changed.
Jason: I can see that you don't have a lot of control over your powers. Do you need help? I can...
Beth: No thanks, I don't need your help, especially from a cop.
(Jason approaches.)
Beth: Back off. (In a defensive stance, fear making her fangs show.)
Jason: Well, looks like you couldn't keep your secret for too long, huh? (Laughs)
Beth: Screw you, Jason.
Jason: You got a boyfriend, right? He's human, How could your family accepted him and not me? Seems unfair.
Beth: Shut the fuck up... someone is here.
Jason: What? You sure? (Ready to pull his gun)

An unknown person was filming the scene. I don't think that's a good idea for Beth or Jason. This person now knows their secret. He's a cop, and she's a killer. The question is: who is it?