murdering a jail inmate

If a vampire (which in my world means super strength, doesn't appear on cameras, but no Mind Control powers) wants to murder a jail inmate, what obstacles would be in place?

Do walls count as obstacles? How super is the strength? Does he mind just slaughtering his way through the jail? Can bullets kill him?

Who's the prisoner they might have some sort of protection, Who's the vampire how does he get in the jail in the first place? If he's Just feeding he might kill differently than if say he hated the prisoners guts. In most cases I would think a vampire might have enough money to bribe his way in unless you're subverting Vampires Are Rich.

The vampire is a newly-turned teenage foster kid, so she'd definitely not be rich. And she's a good guy, so she wouldn't want to just slaughter her way through. The victim is her father, who murdered her mother and tried to kill her when she was 11 years old.

Bullets aren't very effective on her, but excessive blood loss could still be a problem. Her super strength only works on metal, I'm not sure exactly what it is but she couldn't just tear her way through a thick wall.

... well that sounds like a well adjusted family.

I'm not entirely sure if it's official prison policy but I would think that she would be denied visitation (or whatever it's called) due to her young age, both apparent and actual. further I would think she would have an uber difficult time killing him when and if she does get in. Prisons monitor everything fairly thoroughly so I would think they would notice she does not show up on cameras or brought something to kill him with, especially if it was metal.

Though I suppose she could wear some sort of locket and reshape it into a shiv, they would not expect something like that to happen so quickly even if they did have a reason to suspect her.

Then getting out would be the difficult step.

All in all I would recommend something shady like the warden being a vampire or at least crooked enough to let her get away with it, her bringing in a toxin/airborne-virus/something that would affect humans but not vampires, or use the prisons "black market" against her father. Say, for example, smuggling herself in as a juvie. Another possibility would I suppose be as a underage prostitute though I would half to wonder, well, how crappy is that prison to have that problem. but whatever works for your story.