Twisted Desire by Sharon Kay

Rhys MacLeod is a warrior first and a hacker second. Preserving the balance of power among supernatural beings is his prime directive, as well as keeping it far from human eyes. The discovery of a man killed by magical force on a Chicago street lands him on an op he didn’t expect. He’s good, but solving this crime requires a call to the best of the best.

Parker Black of Titan Group never met a network he couldn’t infiltrate. Along with Titan team member Locke Oliver and Megan, a scientist who witnessed the murder, they uncover a maze of encrypted files and unethical DNA manipulation.

Rhys is duty bound to keep all supernatural details hidden from his human friends, so identifying the killer becomes more complicated when clues indicate the perp isn’t human. And when the murderer shows up at their location, every second counts before its true nature is revealed.