The Good Liar — Denise Mina

BLOOD WASHES OFF, BUT GUILT STAINS…

In this provocative mystery from beloved crime writer Denise Mina, new evidence in an old murder case forces one woman to make an impossible choice.
 
A year ago, a father and his fiancée were brutally murdered in their opulent London townhouse, sparking the most high-profile murder investigation in recent history. Blood spatter expert Doctor Claudia O'Sheil's evidence put the killer behind bars -- or so everyone believes. But since the trial, Claudia's learned a horrific truth. Her evidence and her testimony were wrong. And someone she knows made sure of it.
 
Now, as she takes the stage before the elite of London to give a career-defining speech, Claudia faces a devastating choice. Protect her children and her career with her continued complicity, or blow the whole conspiracy apart and reveal the truth: not only is the real murderer still out there, but they're in the audience. And they'll do anything to keep their secrets buried â€" including burying Claudia with them.
 
As Claudia steps toward the microphone, she's desperately revisits that fateful night. What really happened? And what speech will Claudia give?