Secret Service agents sent to Colombia ahead of President Barack Obama were relieved of duty and returned home amid allegations of misconduct, a spokesman said. -snip- One of the agents did not pay one of the prostitutes, and she complained to the police," Kessler said. Calling it "clearly the biggest scandal in Secret Service history," Kessler said 12 agents are accused of involvement in the incident "in one degree or another," from allegedly interfering in the investigation to participating in other alleged misconduct.