Guilty as Sin by Kylie Brant

Investigative reporter Reese Decody possesses a chilling gift—the ability to sense buried guilt in others. This unwanted talent led her straight to Stephen Thorne, the notorious Trifecta Killer. But hunting monsters has consequences, and Reese barely survived her encounter with the sadistic predator who made her his only living victim.
Now Thorne has escaped, and forensic profiler Hayes Moreland is determined to protect the woman he’d rescued from the violent fugitive. As Thorne’s obsession with Reese intensifies, she’s fighting another battle—securing conservatorship of her mentally ill brother following her aunt’s suspicious death. When a mysterious poisoning points to Reese as the prime suspect, she finds herself trapped in a web of suspicion that threatens everything she’s fighting for.

With a killer drawing closer and unseen enemies undermining her, Reese must decide if Hayes is truly her protector—or if trusting anyone might be her final mistake.