Blood Moons - Blood and Shadows, #1

They say no good deed ever goes unpunished, a sentiment Dara understands fully now that she is paying for a crime she didn't commit. It was stupid to call in a murder she didn't really see. But how could Dara have kept silent? Now a stunning-scratch that, a dangerous-man with a frightening secret of his own is telling her he can help. Yeah, right. A telepath knows better than to trust mere words. The last decade of Tristan's life has been penance.
All that time spent among the worst dregs of society might have made him begin to question his humanity, but he's never felt so much like an animal as he does around this timid, delicate female. Her very presence stirs the beast within him; Tristan can feel it growing stronger every day. Any more time with Dara, and it might overpower him completely. But without her, he stands no chance at all.