On Sunday, they announced a $10,000 reward for more information in the case. The officers and firefighters are campaigning against a ballot measure the councilman supports.
The "No on Measure V" campaign posted a YouTube video that shows Councilman Pierluigi Oliverio handing over several "No on V" signs to police from the back of his car.
Oliverio supports the "Yes on V" campaign. If passed, Measure V would limit the raises police and firefighters gain through contract arbitration.
Oliverio claims he removed the signs from public property in keeping with San Jose city law.
Measure V opponents insist he illegally took them from private property.