Just to make sure the facts are straight, the Buffalo officers said that (a) they only resigned from their volunteer positions on the Emergency Response Team (who are handling protest control) and not from the force, and (b) they didn't do so in a show of solidarity with the two officers who were suspended and charged for pushing the senior citizen.
This is from WKBW Buffalo's website:
The officers we spoke with said the Buffalo Police Benevolent Association’s statement asserting all 57 officers resigned from ERT in a "show of support” with the two officers that were suspended without pay is not true.
“I don’t understand why the union said it’s a thing of solidarity. I think it sends the wrong message that ‘we’re backing our own’ and that’s not the case,” said one officer with whom we spoke.
“We quit because our union said [they] aren’t legally backing us anymore. So why would we stand on a line for the City with no legal backing if something [were to] happen? Has nothing to do with us supporting,” said another.