This happened a while back with very little news on it.

Obama Bodyguard Found Dead After Having an Affair With a Foreign National

A Bodyguard of Obama was found dead in his car, ruled a suicide by carbon monoxide poisoning from the car exhaust. Before he died, he was under investigation for an extra marital affair with a foreign national.

(Photo by Chip Somodevilla/Getty Images)

Opinion

Cassius Methyl | August 5, 2013

Employees for the government sometimes are required to inform the agency about relationships with foreign people, allegedly to confirm that the person is not a threat to ‘national security’. Apparently, one of Obama’s bodyguards, Rafael Prieto, had an affair, and killed himself for some reason while under investigation. His secret was revealed by other agents during their investigation for another sex scandal.
Maybe the reason he killed himself was his marriage failing, or maybe it was something more complicated, such as what he saw working for the government, or what he learned. Maybe he was murdered, but that is not likely because it is difficult to force someone to sit in a car filling up with carbon monoxide. Maybe he was knocked unconscious first.
This may be noteworthy to provide insight into the behavior and mental complex of these employees of government; bodyguards, agents, officers. In some cases, the track record of these people is to be filled with prostitution, indulgence in alcohol and criminal behavior, etc. Earlier this year, 13 Secret Service agents were implicated in a prostitution scandal in Colombia.
This was what was under investigation, when the bodyguard who killed himself has his secret revealed. Officers and agents led prostitutes to their hotel after a long night of drinking and partying, possibly doing other drugs. An apparently self-righteous and inconsiderate agent refused to pay a prostitute he used for sex, and he yelled at her in a hallway. The incident went public, and someone connected to Rafael essentially told on him.

http://intellihub.com/2013/08/09/obama-bodyguard-found-dead-after-having-an-affair-with-a-foreign-national/