A CBS News journalist covered all of Friday night's events until he himself was detained.
Sopan Deb was on the floor of the arena as tensions built - raw emotions on both sides. He interviews both protesters and Trump supporters.
Police clear the pavilion, and the streets outside are quickly blocked. Tensions are high. Deb shoots video of an arrest. Police surround a man whose face is bloodied.
Protesters scream at police. Deb says he was thrown to the ground and handcuffed, without notice or warning.
He was charged with resisting arrest based on a complaint by the Illinois State Police although there is no sign of resisting arrest on the video.