"The Mayan Rite," by Terence Faherty, in Alfred Hitchcock's Mystery Magazine, June 2013.
"When I first heard 'Mayan rite,' I thought it might involve a human sacrifice. Maybe even the removal of a beating heart."
Anya's smile died. "Every wedding requires a human sacrifice," she said. "And often the removal of a beating heart."
Well, I don't know about you, but that exchange certainly got my attention. It happens deep in the middle of this story, which is largely a character study. My co-blogger Faherty has a great talent for characterization through dialog. See Anya above, for instance.
The protagonist, Robert, is a middle-aged guy, down in Mexico for a family wedding. We don't learn a lot about him (not coincidentally he's the one who talks the least, a very reserved sort of guy). His brother, on the other hand, is more outgoing: "Before we're done, Mexico's gonna be sending out for more tequila!"
But Robert is the one who notices what appears to be an unhappily married couple. And he notices some bad stuff... There is clever deduction in here too. A lovely piece of work.