Forgive me for sounding confused, but WHICH op are you talking about?
If it is the Iran Caper, there was NO trip to Mehico. There was an FBI guy in an office in Houston who was pretending to be a zeta mrmber in Mehico. HE as the one who transferred money into this dip’s account...twice.
There was no Mehican involvement EXCEPT that the idiot got on a plane to go to Mehico to actually MEET with the other dip who he thought was a zeta member.
THEN the DOJ contacted the Mehican government and told them that a wanted fugitive was on board, so the Mehican government refused to allow the plane to land and turned it back around to come back to the US. That’s when they arrested the booger LAST MONTH.
For emphasis so it doesn’t get lost - this is OLD NEWS trotted out NOW:
http://www.reuters.com/article/2011/10/11/us-usa-security-iran-idUSTRE79A5E020111011
Officials said that the Saudi ambassador, Al-Jubeir, who is close to King Abdullah bin Abdul-Aziz and has been in his post since 2007, was never in danger. President Barack Obama was briefed in June about the alleged plot and through a spokesman expressed gratitude for it being disrupted.
The assassination plot began to unfold in May 2011 when Arbabsiar approached an individual in Mexico to help, but that individual turned out to be an informant for the U.S. Drug Enforcement Administration.