Special Agent in Charge Ken Valentine of the Secret Service's Oklahoma City field office confirmed his agency's involvement, although Shortey's alleged crimes don't fit into the agency's normal financial crimes bailiwick.
The Latest on a criminal investigation of state Sen.
Moore police have said they uncovered a series of electronic messages between Shortey and a 17-year-old boy using the messaging application Kik.
Shortey, 35, had been found with the boy at the Super 8 Motel in Moore, Oklahoma City, on March 9, following a tip off from the teenager's father.
Ralph Shortey, who was Oklahoma chair for the US President during the primaries, is now under pressure to resign from the Senate. Given the lurid details contained in a police affidavit, it's hard to imagine Shortey surviving this scandal.
State prosecutors charged Shortey last week with engaging in child prostitution, transporting a minor for prostitution and engaging in prostitution within 1,000 feet of a church.
The FBI is investigating a state senator who is accused of soliciting sex from an underage boy, and has executed a search warrant at his home, the agency confirmed Monday.
Shortey's bond was set at $100,000.
The Oklahoma Senate imposed sanctions Wednesday on Shortey, voting 43-0 for a that accuses him of "disorderly behavior".
Moore police conducting a welfare check on a teenage boy last week found the youth in a hotel room with Shortey. Among other things, it removes Shortey from membership and leadership of various Senate committees, bars him from occupying his office and reserved parking spot at the Capitol, blocks his expense allowances and authorship of bills, and revokes his right to have an executive assistant. The Oklahoma Senate is fully cooperating with all authorities looking into this matter.
Shortey hasn't responded to requests for comment.
Court records don't show whether Shortey has retained an attorney, and he hasn't responded to texts and voicemails seeking comment.