The Minnesota Secretary of State has this description of the December 19 meeting of the electors in St. Paul. Unlike the Washington and Colorado Secretaries of State, the Minnesota Secretary of State did not give complete information about the meeting.
This news story reports that Muhammud Abdurrahman, who was duly elected by the voters on November 8, voted for Bernie Sanders. He was then told to leave the table at which electors sit. He complied, and his seat was taken by an alternate, who voted for Hillary Clinton.
The only clue in the Secretary of State’s press release that something unusual happened is at the bottom. The Secretary’s list of alternate electors is missing any entry for the fifth district. That is because it was the fifth district alternate who took the place of the original elector.