As the Senate impeachment trial of President Trump drew to a close in Washington earlier this month, federal prosecutors in New York contacted witnesses and sought to collect additional documents in an investigation related to Trump’s personal attorney Rudolph W. Giuliani, according to people familiar with their activities.

The recent steps — including an interview with a witness last week — indicate that the probe involving Giuliani and two of his former associates is moving forward, even as the Justice Department has set up a process to evaluate claims Giuliani is making about alleged wrongdoing in Ukraine related to former vice president Joe Biden.

At the same time, the U.S. attorney’s office in the Southern District of New York — which Giuliani led in the 1980s — appears to be continuing its wide-ranging investigation of his activities and those of his former associates Lev Parnas and Igor Fruman, including their efforts in Ukraine…

The unfolding Giuliani case could further test Barr, who told ABC News this week he is “not going to be bullied or influenced by anybody” and urged the president to stop tweeting about Justice Department criminal cases.