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Introduction

To predict the likelihood of an offender committing further offences, the RoC*RoI (risk of reconviction/risk of imprisonment) tool is used.

Definition: RoC*RoI

The RoC*RoI tool is a computer-based statistical model, available in IOMS, which uses an offender's criminal history and demographics to assess their risk of re-offending. It specifically predicts:

  • an offender's probability of reconviction within the next five years
  • the seriousness of the re-offending, and
  • the likelihood of imprisonment.
RoC*RoI scores

The following table shows the level of risk associated with RoC*RoI scores and the related probability of imprisonment.

Score

Level of risk

Probability of going to prison in the next 5 years

0.00 - 0.49

low

less than 50%

0.50 - 0.64

medium

greater-than-even

0.65 - 0.89

high

imprisonment is likely

0.90 - 1.00

very high

greater than 90%


Factors

RoC*RoI will measure and weigh up the following factors:

  • gender
  • age at first conviction
  • previous convictions and age at subsequent convictions
  • time in the corrections system
  • time between offences
  • seriousness of previous offending
  • type of previous offending, and
  • current offence (only if it has been entered in the court management system (CMS)).

Note: The RoC*RoI score will change after sentencing as it will then include the current sentence.


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