"The CSO made an announcement that he would be checking for university identification. When a person, who was later identified as ... Tabatabainejad, refused to provide any identification, the CSO told him that if he refused to do so, he would have to leave the library.
"Since, after repeated requests, he would neither leave nor show identification, the CSO notified UCPD officers, who responded and asked Tabatabainejad to leave the premises multiple times. He continued to refuse. As the officers attempted to escort him out, he went limp and continued to refuse to cooperate with officers or leave the building.
Greenstein said Tabatabainejad encouraged others in the library to join his "resistance." She said a crowd gathered around the officers.
http://www.nbc4.tv/news/10325914/detail.html
"When asked whether the student resisted when officer attempted to escort him from the building, the witness said, "In the beginning, no. But when they were holding onto him and they were on the ground, he was trying to just break free. He was saying, 'I'm leaving, I'm leaving.' It was so disturbing to watch that I cannot be concise on that. I can just say that he was willing to leave. He had his backpack on his shoulder and he was walking out when the cops approached him. It was unnecessary."