Ministry is Murder Series by Emilie Richards

Meet the unconventional Aggie Sloan-Wilcox, a minister's wife with her own calling: helping troubled  souls in need of justice.  When the naked body of a murdered woman turns up on Aggie's front porch--and suspicion falls on Aggie's husband--she doesn't have a prayer of clearing his name unless she can uncover the truth in a town not known for confessing its sins.

With the chalk outline gone from their front porch, Aggie Sloan-Wilcox and her minister husband think they can resume their lives. But when Ginger, Aggie's despised former foster sister, comes for Christmas, and turns up dead as a drumstick, Aggie's sister is suspected. Now it's up to Aggie to find the real murderer-who's decided there's a loophole in thou shalt not kill.