The Leviticus Murders - Detective Scott Murphy Series, #1

Leviticus, chapter 18, verse 22, from the Bible has been interpreted as "a man having sex with a man, as one does with a woman, is an abomination to God." Many modern day Christians have used this one archaic law to show hate towards gays. Now a killer is using the rest of the Leviticus laws to punish people for their sins. Most of these laws demand death by stoning or burning. This killer is selecting people for breaking God's laws and proving the point that if we believe in one law, we have to suffer the rest.
To be certain the world knows the sinner's offense, he leaves chapter and verse spray painted on the walls at the scene of the murders. Detroit Police Detective Scott Murphy is tasked to find the Leviticus killer before he murders again. What is the killer's real agenda and who will be next to die?