However today's move is not CPD's first introduction to the PSLM protest. Plainclothes CPD officers were present in the Yard yesterday in an observer role, and more than 20 officers responded to Wednesday night's rally when it spilled out in Mass. Ave.
The sit-in has already cost HUPD tens of thousands of dollars in overtime for officers.
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-Staff writer Garrett M. Graff can be reached at ggraff@fas.harvard.edu.