Former special counsel Robert Mueller said he continued to investigate whether President Trump colluded with the Russians during the 2016 election even though Justice Department policy said the president couldn’t be indicted.

“Well, you don’t know where the investigation is going to lie, and OLC opinion itself says that you can continue the investigation even though you are not going to indict the president,” Mueller told lawmakers during his testimony Wednesday before the House Judiciary Committee.

He was referring to the Department of Justice’s Office of Legal Counsel, which says a sitting president can’t be indicted.

Rep. James Sensenbrenner (R-Wis.) said that, armed with the knowledge that President Trump couldn’t be indicted, Mueller was just “fishing.”

He asked if others can be indicted but not the president.

“True,” Mueller responded.