Assistant Chief Constable Marcus Beale, of West Midlands Police, defended the decision to charge Ms Kabal.
Assistant Chief Constable Jerry Kirkby said he accepted the house-to-house inquiries should have been more exhaustive.
Assistant Chief Constable Marcus Beale urged anyone who knew of people being "radicalised" to come forward.
Assistant Chief Constable of Kent Barbara Wilding is conducting the independent inquiry into the shooting.
Greater Manchester Police's assistant chief constable said officers had faced "unprecedented levels of violence".
The assistant chief constable also said the force was far from complacent about racially motivated crimes.
The officer is also a previous assistant chief constable of the Thames Valley force.
Assistant Chief Constable George Hamilton, who led the talks, said they had been "candid, honest and frank".
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About 32 police officers were injured in the past week's violence, Assistant Chief Constable George Hamilton said.
Assistant Chief Constable Gary Beautridge told a press conference that a shotgun had been recovered from the scene.
Speaking outside Newcastle Crown Court, John Sampson, assistant chief constable of West Yorkshire Police, branded Bieber an enigma.
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Assistant Chief Constable Garry Shewan said the officers pulled over a car they believed to have been speeding.
Assistant Chief Constable Duncan McCausland said the dissidents have little or no support, even from within republican areas.
Assistant Chief Constable for Belfast Alan McQuillan said it exploded as Mr Branagh was about to throw it.
Assistant Chief Constable James Vaughan pointed to the government's Comprehensive Spending Review for the cuts in officer numbers.
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Mr Paxton worked at Suffolk Police for 12 years from 1989 and is currently Assistant Chief Constable of Staffordshire.
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Mr Hogg was assistant chief constable in Durham and deputy chief with neighbouring Cleveland before he retired in 2008.
Assistant Chief Constable Sharon Taylor, of Devon and Cornwall Police, said the arrests were carried out as a "precaution".
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Assistant Chief Constable of Greater Manchester Police, Justine Curran, described the fans as being "like a pack of baying wolves".
Iain Spittal, who is currently assistant chief constable at North Yorkshire Police, will take up his new role next month.
Mr Gilmore is deputy chief constable in Northumbria and was previously assistant chief constable in West Yorkshire for two years.
Assistant Chief Constable Ian Hopkins of Greater Manchester Police, said some trucks were stopped and warned for driving "unacceptably slow".
Paul Broadbent, previously an assistant chief constable at Nottinghamshire Police, is now chief executive of the Gangmasters Licensing Authority (GLA).
Speaking after violence, Assistant Chief Constable Stephen White said he was very angry and disappointed at what happened at the barrier.
He started his career with Avon and Somerset Police before transferring to Wiltshire Police as an assistant chief constable in 2007.
The investigating team will be led by Assistant Chief Constable Stephen Cahill who recently joined South Wales Police from Merseyside Police.
The briefing will also be attended by Assistant Chief Constable Sam Kinkaid, who is heading the inquiry into the Northern Bank robbery.
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Assistant chief constable Sean White hopes it will have a "positive" result.
Maria Wallis, who is also an assistant chief constable, was earlier cleared of any wrongdoing and did not face any disciplinary charges.
He will be allowed to continue to serve as assistant chief constable.
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