FILE - In this Nov. 18, 2011 file photo, University of California, Davis Police Lt. John Pike uses pepper spray to move Occupy UC Davis protesters while blocking their exit from the school's quad in Davis, Calif. Pike later lost his job, as did UC Davis Chancellor Linda Katehi. University of California, Berkeley police took a hands-off approach to protesters on the campus last week when violent rioters overtook a largely peaceful protest against a controversial speaker. But that response is being questioned as demonstrators become increasingly hostile and politics are more polarized. (Wayne Tilcock/The Davis Enterprise via AP, File)
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