In a press release, Victoria police's acting senior sergeant Sharon Darcy made her force's concerns clear.

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"We believe at least 10 or more people have witnessed some of the events, " Detective Senior Sergeant Brian Archer said on Thursday.

BBC: Jesse Ryder: Police seek motive for NZ cricketer attack

"Unfortunately Mr Ryder has no recollection of what took place or the events leading up to the incident, " Detective Senior Sergeant Brian Archer said.

BBC: NZ cricketer Jesse Ryder 'has no memory of attack'

Historically, defeating an insurgency has taken eight, nine, 10, 11, 12 years, about the same length of time you suggested it takes to train actually a senior sergeant.

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"It appears that Jesse has been the victim of a serious assault and suffered head injuries as a result, " Detective Senior Sergeant Brian Archer told a nationally televised news conference.

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In fact, I just spoke with the command sergeant major--that's the senior enlisted person in Afghanistan--the first time a woman has been the command sergeant major in a combat theater and that was her point completely is that it's more than a recruiting issue.

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They are already hearing some good news - a senior local government source has told the BBC's Mike Sergeant that agreement has been reached between councils and the unions on the "principles" of a deal.

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