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February 8, 2016

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How CCTV is Used in Criminal Investigations [Infographic]

While the use of CCTV footage might be time-consuming, it can also be vital for the persecution of criminals.

This infographic from JMC Technologies explores how CCTV is used in criminal investigations. The infographic illustrates:

  • Common uses of CCTV for police;
  • Performance standards for CCTV;
  • Immediate benefits of CCTV in an investigation;
  • Outcomes of CCTV in an investigation;
  • Process for retrieving CCTV footage;
  • Steps in disseminating CCTV footage; and
  • Guidelines for using CCTV footage as evidence.

how-cctv-is-used-in-criminal-investigations

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SimonLambertConsultant
February 9, 2016 12:22 pm

I don’t wish to be ‘that guy’ but it’s a shame to see two factual errors leaving readers wrongly advised.

In the Performance Standards section the 5% should be called Monitoring. Observation should be 25% and Identification 100% (it was 120% many years ago). Note that these figures are for standard definition images specifically (576 lines tall). HD, e.g. 1080 lines, can proportionally reduce these percentages according to their vertical resolution. I hope that helps. Grumpy old git signing off 😉

David Spreadborough
February 16, 2016 12:25 am
Daria Kravchenko
Daria Kravchenko
February 16, 2016 5:00 pm

I find these guidelines contradicting. First they say make a copy of the disc if its material is relevant, and then they say the video recording medium must be an original recording. I guess a copy made by the person, other than the dedicated investigator will be inadmissible in the court of law, as the chain of custody is required.

David Spreadborough
February 16, 2016 11:48 pm

Daria – A ‘bit for bit’ export of the original recording onto another suitable medium can be deemed an original. The first export to be produced can be copied further, as long as the data is not changed. Any copy process should be documented.  If the format of the data is changed during the original export process, if it gets transcoded, then this could be deemed inadmissible. This is more likely if questions cannot be answered due to not having an original copy. Transcoding, or versions, of the original can be made and these will be exhibited individually. Each one… Read more »

OmbongiMoraa
OmbongiMoraa
February 17, 2016 5:46 am

It shouldn’t really be copying but cloning/imaging the HDD & using a write blocker. Either way, this acquisition of CCTV evidence must be conducted with all parties involved (the court order, the client rep ) and the Chain of custody is a bummer.

The rule is never work with original evidence; several “certified copies” of the files might constitute original evidence. These “certified copies” are achieved by bit-stream imaging.

Allevate
Allevate
February 18, 2016 9:31 am

How to improve efficiencies of those who have to review and investigate countless hours of CCTV footage?
Some thoughts here:
http://allevate.com/index.php/2013/08/01/intelligence-and-efficiency-through-on-demand-media-analysis-using-face-recognition/

Adam Bannister
February 19, 2016 9:29 am

SimonLambertConsultant Hi Simon. Thanks for the free fact checking service as always! Have told JMC Tech about everyone’s feedback to give them a right of reply…