Six journalists were taken into custody while covering the protests in Ferguson, Missouri, on Monday and early Tuesday, aggravating what one press freedom group has called a "concerted, top-down effort to restrict the fundamental First Amendment rights of the public and the press."
The incidents bring the total number of journalists arrested during the mid-August protests to 11.
Authorities tried to restrict members of the news media to a designated area away from the protests, sometimes nicknamed a "press pen."
Kerry Picket, a reporter for the conservative website Breitbart News, was arrested around the same time as Olson. She was held for "several hours," the website said.
"Picket was released when it was discovered that the trooper misunderstood directions from his superiors and was told to not allow vehicle traffic through but to allow foot traffic through.
Ryan Reilly of The Huffington Post and Wesley Lowery of The Washington Post were arrested inside a McDonald's in Ferguson. They were released 45 minutes later without being charged.
Is McDonald's a "war zone" too?