Lethal Betrayal by Kimberly Van Meter

She vows to stay impersonal. But for him, the case is anything but.

When a body with a cold-case victim’s name written on it is discovered, FBI Agent Sophia Bennett teams up with Agent Noah Thunderhawk, Bureau of Indian Affairs, to investigate the crime. The evidence — and Sophia — challenges Noah’s faith in the reservation elders. How could one of his own be complicit? But as tension — and undeniable attraction — rise, dangerous patterns emerge. Missing girls...a trafficking network...the wall of silence they keep hitting...someone high up is murdering to keep their secrets. And Noah and Sophia are in their crosshairs.