FBI Director James Comey’s announcement two days ago that he would not to recommend charges against Hillary Clinton following an investigation into her use of a personal email system earned him an invite to Capitol Hill on Thursday, where he testified for nearly five hours before the Republican-led House Oversight Committee.

The decision by Comey and, a day later, the Justice Department, not to pursue a criminal case against the presumptive Democratic nominee has thrust the career prosecutor into the bubbling cauldron of the 2016 presidential contest. But this isn’t the FBI chief’s first time in the headlines.

Here are seven things to know about Comey:

He opposed Bush White House officials in a dramatic standoff