Dragom Dragom:
Well to make a proper Psychopath you first take a simple born Sociopath or similar Anti-Social and then you confine and torture them for a couple years.
I don't think she'll get better but if exposed to a happy and normal life she shouldn't get any worse.
And as a 16 year old she shouldn't have as many barriers she'd be tempted to overcome with horrific violence.
Except for those snooty cliky high school girls, that roam about in packs of semi feral Jens and that jerk who asked her to the prom but spent the whole night dancing with some other chick...
How about when she's 18?
No, a psychopath, can be born completely normal. This is where nature versus nurture comes in. Sociopaths are born damaged, while a pschopath is damaged by external forces, like abuse, during their formative years. A psychopath could have been a normal person had they been brought up properly, but sociopaths were never normal and never can be, no matter what their upbringing.