Professional Journalism

In a note to readers, Intercept Editor-in-Chief Betsy Reed wrote that Thompson attributed quotes to people who say they had never been interviewed, could not remember being interviewed or couldn't be found. He created fake email accounts purportedly from some of these sources and lied to his editors.
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Thompson claimed he spoke to Scott about the shooter. Scott allegedly told Thompson that "Dylann was normal until he started listening to that white power music stuff" and "he kind of went over the edge when a girl he liked starting dating a black guy two years back."
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During their investigation, editors for the Intercept spoke to members of the Roof family, who said they had never heard of a cousin named Scott.

In another story, about Black Lives Matter activists being blocked from a Donald Trump rally, Thompson invented quotes and people. He gave the full name of one of his sources, who told the Intercept that she was not at the rally, was not a Trump supporter and never spoke to Thompson. The Intercept also couldn't verify the existence of a BLM activist who allegedly provided a quote to Thompson.
That line of Insty is 'a Democrat with a byline', and it does seem to fit.