Is Gordon Sondland an informer?

Business Insider: American ambassador to the EU Gordon Sondland, who “betrayed” Trump at the impeachment hearing, is called an “informer” and compared to the US rapper 6ix9ine, who testified against members of his gang to shorten his sentence.

This, incidentally, is far from the first time that the US policy interferes with criminal slang. Not so long ago, Trump on Twitter called his former lawyer Michael Cohen, as well as Don McGan, an ex-White House adviser to be “rats”.