The 56th Man. Ari Ciminon - The 56th Man, #1

A former member of Saddam Hussein's Special Security Force arrives in Richmond, Virginia. Under the name of Ari Ciminon, he sets up house on the James River. The house was purchased for him by the U. S. Marshals Service, which is responsible for watching over him while he supplies intelligence to CENTCOM. Because he is fluent in Italian (as well as a host of other languages) he is presented to his new neighbors as an Italian of Arab descent.
Ari learns on his first day that the previous occupants, Jerry and Moria Riggins and their two sons, were murdered in their home nine months ago. The murders are unsolved. Ari has plenty of free time on his hands and sets out to solve the crime--in his own peculiar way.