Nightfall - C. D. Moulton - Bog

Clint is having a delicious meal until a family comes to the long table on the deck of the Pirate. A malicious oldman has, apparently, brought his family on a vacation where he constantly belittles them,
He suddenly can't swallow. Clint goes to help.
The old man is murdered that night, Clint is called to aid the police.
Then it gets weird. More murders, horse race fixing, the doctor and lawyer are in Panamá?
Then it really gets weird - to the point Clint has to go to Ecuador, Peru, Colombia, Brzil ...
Can he hope to bring this killer to justice?
He will damned well give it a shot!