The Last Trumpet — Todd Downing

In this Mexico-set mystery with “excellent atmosphere” featuring a sheriff and an amateur sleuth, a bullfighter is dead -- but was the killer man or beast (Kirkus Reviews)?
 
In Matamoras, Mexico, the last trumpet has sounded in the bullring, but this time it's not the bull who's died. Carlos Campos has been fatally gored. But soon a shocking discovery is made: the apparent accident is actually a murder . . .
 
To solve the case, former US Customs agent and Texas citrus farmer Hugh Rennert will team up with Sheriff Peter Bounty to identify a motive and a suspect. And there's no time to lose as the killer hasn't limited himself to a single victim . . .
 
“You won't go wrong in giving Todd Downing a try.” -- Michael Dirda, The Washington Post