David Nieland was an aide with the DHS inspector general . He raised concerns over OIG trying to investigate the Secret Service involvement with prostitution . Nieland was an investigator with the DHS inspector general , who claimed that political interference appeared to cause the inspector general to hold back findings in an investigation of Secret Service agents involved with prostitutes in Cartagena , Colombia . Nieland was interviewed by Orange County Sheriffs Deputies who were conducting an anti - prostitution operation .
David Nieland was an aide with the DHS inspector general . He raised concerns over OIG trying to investigate the Secret Service involvement with prostitution . Nieland was interviewed by Orange County Sheriffs Deputies who were conducting an anti - prostitution operation .