Dark Matters by Ryan M. Williams

Brock Marsden isn’t quite human any longer.

Using technology from the Galactics, Brock incorporated DNA from other species into himself. It gained him longevity, better vision, and faster reflexes. All traits valuable when tracking down the worst killers on the planet.

A banker hires Brock to track down the being that murdered and mutilated his daughter.

Brock’s partner at their detective agency saddles Brock with an alien intern. With a complicated love life, a police chief who’d like to shut him out of the case, and a threat from his distant past—Brock faces a case like none other.

It will take all of Brock’s alien-enhanced abilities to stop this killer—and maybe more than he imagines.