Wild Thing by J. Kenner

Part panther, part human, Luc Agassou lives a cursed life. Only his true mate can save him, but Luc has given up the hope of ever finding her. And so he stays hidden in the shadows, locking himself away from those he might harm.
Caitlyn Raine has spent her life fighting her own personal demons. Now a detective, she’s made it her mission to track down and lock away the human monsters that roam the dark streets of New Orleans.
From the moment he sees her, Luc knows that Cate is the the one. But in order to save him, Cate will have to give in to her own primal urges and leap into the dark … trusting that their love will save them both.