Grave Surprise by Charlaine Harris

Harper Conley can find dead bodies and determine what caused their death.  She and her brother Tolliver travel the country helping families find closure.  It is a difficult way to make a living but you do what you have to do. 
When called to Memphis to go through and old cemetery as part of a college class, mostly so the professor could prove them fakes, did not work by the way, she comes across the body of a young girl she had actually looked for several years earlier, in Nashville. 
Of course law enforcement is suspicious of both Harper and Tolliver and they must work hard to defend themselves.
Very good read!