Here is another indicator that Muelller is going after Hillary

Special counsel's Russia probe loses top FBI investigator

"One of the FBI's top investigators, tapped by special counsel Robert Mueller just weeks ago to help lead the probe of Russian meddling in last year's presidential election, has left Mueller's team, sources tell ABC News."

"As chief of the FBI's counterespionage section last year, he helped oversee the FBI's investigation into Hillary Clinton's use of a private email server when she was the secretary of state, and he took part in the bureau's interview of her."

[link to abcnews.go.com]