Are you certain that is the same man?
The murderer wasn’t a Christian.
His books listed on Amazon:
http://www.amazon.com/Cosmo-Setepenra/e/B016QV5AQK
His dedication to his book, The Laws of the Cosmos:
I give honor and Ra-spect to our Creator, Amen-Ra.
He converted 3 years ago to Islam.
Was a Christian before. Yes, there may be two writers with that same name.