There is a lot of detail in this WP article about Murphy. He should be fired. Period.
https://www.washingtonpost.com/national-security/dhs-official-whose-office-compiled-intelligence-reports-on-journalists-and-protesters-has-been-removed-from-his-job/2020/08/01/f01247be-d3ff-11ea-8d32-1ebf4e9d8e0d_story.html
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...............Recently, Murphy tried to broaden the definition of violent protesters in Portland, in a way that some officials felt was intended to curry favor with the White House.
According to an internal memo, Murphy announced that the label violent opportunists, which his office had used to describe people who were attacking law enforcement personnel and property, would be changed to violent antifa anarchists.
Murphy argued that the violent protesters were not merely taking advantage of a moment but had overwhelmingly been linked to radical ideologies driving individuals toward violence. That conclusion was undercut by an earlier DHS analysis that found there was not enough information about the Portland protesters for the department to know how they might be connected to anti-fascist or anarchist groups and what precisely was motivating them. Many of the protests in Portland have been peaceful and in response to police violence around the country.