Crash Into Me by L.A. Fiore

When a stabbing death calls homicide detective Molly Donahue and her partner to Central Park, it’s just the beginning of a string of murders in an investigation that leads them to Los Angeles, and the death of a Hollywood starlet three decades earlier.
During the course of their investigating, they interview billionaire Kade Wakefield. Molly isn’t prepared for her reaction to him. He’s stoic, intense and possibly on the wrong side of the law, but she’s undeniably attracted.

Kade Wakefield isn’t expecting detective Molly Donahue. She’s the law, and he follows it when it suits him, but the insatiable hunger she stirs has his well-honed control pushing at the cage to break free.
As the investigation heats up, they start an intensely passionate affair but soon learn what’s between them is more than physical, something they’re willing to give it all up for, but her case takes a deadly turn and the one she hunts is now hunting them.