So the Dutch guys on Holiday there doing Spanish lessons at the language school with K&L (obviously can't speak Spanish or why the hell would they be taking classes?) just magically happen to have contacts in Boquete (despite not being able to speak the language) and arrange for them to be killed? What?

If you are going to go down that route, then what about the travel agent in Holland? They booked the trip and knew the locations and dates? Or maybe someone hacked the travel agents and saw the booking and it was cyber terrorists who hired hitmen in Boquete for some completely absurd reason?

Or maybe, just maybe they left the trail and couldn't find their way back and there was no international conspiracy, Men in Black, organ-harvesting terrorists or professional hitmen involved.