The most glaring recent example is the unfolding controversy over his strong-arm effort to overhaul the city’s school board.

Erik Martinez will be departing City Hall on Friday after a brief stint in which he took over for Sydney Holman, the deputy mayor of intergovernmental affairs.

OPD has used the gunshot detection technology system since 2006. Critics say it’s not an effective violence reduction tool.

The move is projected to save $110 million. But alders Raymond Lopez (15 th Ward) and Silvana Tabares (21 st Ward) used a ...