In the Arms of Stone Angels by Jordan Dane

Two years ago, Brenna did the unthinkable. She witnessed the aftermath of a murder and accused her only true friend--the first boy she ever loved--of being a killer.

Now sixteen, Brenna returns to Oklahoma only to discover that Isaac "White Bird" Henry isn't in juvie. The half-breed outcast is in a mental hospital, frozen in time, locked in his mind at the worst moment of his life. And when Brenna touches him, she's pulled into his hellish vision quest, seeing terrifying demons and illusions she doesn't understand.

Feeling isolated and alone, she's up against the whole town, targeted by bullying former classmates, a bigoted small town sheriff, and a tribe who refuses to help one of their own. But when Brenna realizes she's as trapped by the past as White Bird is, this time she won't turn her back on him. She's the only one who can free them both.

Even if she has to expose her secret--a "gift" she's kept hidden her whole life.