In November, the city's police commission finally authorized the electronic stun guns for its officers.
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Mayor Mark Farrell also included $2 million in the coming fiscal year to buy taser devices.
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All that appears to be in limbo, at least for now.
On Monday, the Board of Supervisors' Budget and Finance Committee voted 3 to 2 to cut the mayor's budget proposal on taser purchases.
Supervisor Sandra Lee Fewer made the motion to scrap the funding, saying she needed a better and more "comprehensive" understanding of the total costs of arming police with the devices.
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Supporting the motion were supervisors Malia Cohen and Norman Yee. Those against were supervisors Catherine Stefani and Jeff Sheehy.
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The full board is expected to take the first of its two votes on the city's full budget July 24. Tasers will most likely come up then.
A ballot measure sponsored by the Police Officers Association in the June election failed.
That measure, if passed, would have given the police union more control in the adoption of a taser policy.
Get the latest on San Francisco police here and the latest taser stories here.