The Guilty One by Kiersten Modglin

Your husband was involved in a fatal accident.
One horrific sentence, delivered in an impersonal phone call, changes Celine Thompson’s life in a second. But when she’s asked to identify his body, what she discovers sends everything she thought she knew about her life crashing down.
This man is not my husband.
But who was the man who died driving Tate’s car? How did he have Tate’s possessions and, more importantly, why do they sport identical tattoos?
We’re going to find him.
When Tate doesn’t answer his phone or arrive home after the accident, Celine fears the worst. Still holding on to hope her husband may be alive, Celine is desperate to track Tate down and figure out what’s going on before it’s too late. The only problem? There are dark truths waiting to come out that are so atrocious she won’t ever be able to look away from them.
As she begins to put together the pieces of the mysterious day her husband went missing, it paints a picture of a man she never really knew. Is it possible Tate is still alive, or is she wasting her time searching for someone who will never be found? And if he is alive, how will they ever survive all that she’s unearthed?
With time running out, Celine must push the limits of the law and her safety to shed light on the secrets that have been hiding in the dark corners of their life together. In doing so, she may just uncover the final missing piece to the puzzle surrounding her husband’s fate.

Someone is lying.
Someone is missing.
Someone is guilty.