True crime - Andrew Klavan

The day Frank Beachum was scheduled to die, Steven Everett was meant to take his kid to the zoo. But when a fellow hack totals her car on the way to work, Everett is assigned the interview with Beachum, sweating out the last few hours on Death Row before his execution. And on this day - the day Everrett is caught in bed with his editor's wife - turning in some good copy might just save his job.

Then as he gets deeper into the case, Everett realises the copy may be better than good, because there's a chance Beachum is the wrong man on the gurney, but with a matter of hours to go before the lethal injection Everett has literally no time to lose if he's to find out if Beachum deserves to die.