Julia Pierson faced hard-edged questioning, from Democrats and Republicans, as House lawmakers called for an independent investigation.
The incident is believed to be unrelated to continuing protests over the shooting of 18-year-old Michael Brown, police said.
The parents of a teen shot by police in Ferguson, Mo., say they have more faith in a federal probe.
“It is our goal to help end race-based discrimination, rooted in this nation’s history of slavery and Jim Crow laws,” the report says.
The remarks marked his second public comments on events there.
Attorney general says nation must reassess police tactics and relationships with minority communities.
Del. Eleanor Holmes Norton wants any new security measures to preserve public access to the area in front of the White House.
Push back on controversy surrounding the embattled DNC chair
Say legislators who don’t want an AUMF debate shouldn’t be in Congress
Intervening in Syria, he said, could just make things worse.