Lying in Judgment. Lying Injustice Thrillers, #1

Peter Robertson serves on the jury of a murder trial -- for the crime that he committed. Peter Robertson, 33, discovers his wife is cheating on him. Following her suspected boyfriend one night, he erupts into a rage, beats him and leaves him to die... or so he thought. Soon he discovers that he has killed the wrong man - a perfect stranger. Six months later, impaneled on a jury, he realizes that the murder being tried is the one he committed.
As the pressure builds, Peter begins to slip up and reveal things that only the murderer would know - and Christine, a pretty and intelligent alternate juror, suspects something is amiss. Can Peter ensure justice for the defendant - without revealing his own guilt to the courtroom?