Tomás Orlando is an aging Colombian drug kingpin and former freedom fighter who appeared in Patience (episode).
He was considered a suspect for the Metropolitan Airport Bombing. He had been aware of the United States Government's attempts to get his DNA and went under the grid, although he didn't know why until he learned from the family of the then-recently deceased Lolita Cortes about his suspected involvement in the bombing.
He proceeded to retire from his Drug Empire, both because he was getting old, and because he wanted to protect his family from any reprisals from the American government. He had timed the announcement meeting for his retirement around the time Operation Lex Talionis was to occur, and leaving just before they stormed his compound.
After somehow sneaking past customs and arriving in the States, he then personally arrived at the NCIS Headquarters and surrendered, seeking asylum at the United States, also revealing he was set up and offered his DNA to prove it. Afterwards, it was revealed that his DNA did not match the DNA used in the bomb, confirming that he was innocent.
Presumably, his requested asylum was granted by the State Department after his innocence was confirmed.