Stone Angel -- Carol O'Connell

Kathy Mallory book number four, in which:

She goes back to her hometown in Louisiana to avenge her mother's death.

She gets arrested.

Charles Butler and Riker follow her there.

She gets out of jail and does some very Mallory-ish (and very un-Mallory-like) stuff.

Charles Butler pulls off some great illusions in a graveyard with the help of a deaf sculptor.

Riker gets the crap beat out of him.

She goes totally Clint Eastwood on the town's ass.

Now that I've finally written this one up, I can allow myself to read the fifth book. 

Oh, and Collomia, since we were talking about reading each other's recommendations, try this series.  But start from the beginning.