Officer Nicholas Young, according to an indictment filed in federal court, tried to help Daesh (ISIS, ISIL, the so-called Islamic State) operatives find methods to communicate covertly, and previously traveled to Libya to assist in deposing leader Muammar Gaddafi.

Young allegedly purchased "stored value" gift cards for a mobile messaging service and other 'technology-related' items to send to Daesh operatives to assist them in evading detection by authorities.

However, as ABC News reports:

"Instead of allegedly engaging with true ISIS associates … Young was actually in touch with FBI informants and agents from the FBI's Joint Terrorism Task Force in Washington, which has been conducting a lengthy undercover investigation into the office, officials say."

But "no pending threat to the D.C. transportation system" exists, unnamed sources told ABC News.

Young has been terminated from his position, according to Washington Metropolitan Area Transit Authority CEO Paul Wiedefeld — who also explained the FBI has been investigating the now-former officer for "several years."