Death Under the Moonflower — Todd Downing

A blood donor is murdered and a Texas lawman must figure out who has blood on their hands . . . “You won't go wrong in giving Todd Downing a try”(Michael Dirda, The Washington Post).
 
A rare type of blood is needed for a rich man's nephew in a Texas town -- but donating seems to be a death sentence. Who would kill goodhearted souls who are trying to save a life?
 
Peter Bounty, the idealistic, cat-loving sheriff, is determined to find out. But he's about to step into a maze involving a strange doctor who's been shunned by the locals, plus politics, potential grudges, and questions of inheritance rights, in this 1930s mystery.