Looking for an adult suspense/thriller a friend told me about. Key details I remember:
• Protagonist is a forensic scientist (female); | think her name is Hailey / Haley / Halle.
• She and her husband are divorcing because he didn't want kids and she did.
• Her father had an accident / was ill and asked her to grab his insurance card from his office – while looking she can't find the card but discovers a hidden box in his office containing evidence that the sister she'd been told died in a car crash (with their mom) was actually taken / missing.
• The sister had been missing for many years (I think ~15). The captor had also killed their mother.
• When the sisters finally meet again, the captor kills the sister, then turns his attention to the protagonist
– the last page flips to the captor's POV observing her through a window.
• Cover I recall: had a road / highway image (maybe a long road at night).
• Definitely adult suspense / thriller. Possibly self-published or newer.
Any ideas? Even partial matches appreciated – thank you!
by sunsetdarlin