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INTERLOCKED DWI OFFENDERS HAVE LOWER CUMULATIVE RECIDIVISM FOR SIX YEARS AFTER INSTALLATION 2010 RSA Conference Richard Roth, PhD Impact DWI and PIRE Roth.

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Presentation on theme: "INTERLOCKED DWI OFFENDERS HAVE LOWER CUMULATIVE RECIDIVISM FOR SIX YEARS AFTER INSTALLATION 2010 RSA Conference Richard Roth, PhD Impact DWI and PIRE Roth."— Presentation transcript:

1 INTERLOCKED DWI OFFENDERS HAVE LOWER CUMULATIVE RECIDIVISM FOR SIX YEARS AFTER INSTALLATION 2010 RSA Conference Richard Roth, PhD Impact DWI and PIRE Roth 6/29/ RSA Conference

2 2 An Ignition Interlock is an Electronic Probation Officer Dedicated Probation Officer in Front Seat On duty 24 hours per day Tests and Records daily BAC’s Allows only Alcohol-Free Persons to Drive. Reports All Violations to the Court Costs Offender only $2.30 per day. (1 less drink per day) Roth 6/29/ RSA Conference

3 Roth 6/29/ RSA Conference3 More and More Interlocks Are Being Used To Reduce Drunk Driving

4 The New Mexico Laws Optional Judicial Mandate for 2 nd and 3 rd DWI Mandatory Judicial Program for 1 st Aggravated and All Subsequent Offenders Indigent Fund (Judges Decide) Administrative Program: Ignition Interlock License available for all revoked offenders with no waiting period Mandatory For All: 1 yr for 1 st ; 2 yrs for 2 nd ; 3 yrs for 3 rd ; and lifetime with 5 yr review for 4 or more Revocation periods increased Mandatory Interlock before unrestricted license Objective Standard for Indigency 4Roth 6/29/ RSA Conference

5 Roth 6/29/ RSA Conference5 12,005

6 Roth 6/29/ RSA Conference6 New Mexico Leads the Nation in Using Interlocks To Reduce Drunk Driving

7 Selection Criteria For Interlock Group, IG, and Comparison Group, CG. 1.Include only New Mexico offenders (visitors are unlikely to be re-arrested for DWI in NM) 2.Select range for Initial DWI Arrest dates the same for both IG and CG. ( ) 3.Select last-date-for-possible-re-arrest to maximize use of available data (3/31/2010) 4.Include Available Correlates: Age, Gender, BACGroup, Priors for each offender. 5.Shift Index time of CG to make it equivalent to IG. Roth 6/29/ RSA Conference7

8 Roth 6/29/ RSA Conference8 Recidivism In the Six Years After Interlock Installation For Those Who Installed within 90 days after Conviction N 32,960 10,114 N N 11, N (22 day shift) (36 day shift) (29 day shift) (32 day shift) From spo

9 Roth 6/29/ RSA Conference9 Recidivism of Convicted Offenders While Interlocks Are Installed From spo Multivariate HR(CG/IG) = 3.95 Multivariate HR(CG/IG) = 1.99 Multivariate HR(CG/IG) = 2.59 Multivariate HR(CG/IG) = 3.10

10 Roth 6/29/ RSA Conference10 Recidivism of Convicted Offenders After Interlock Removal Multivariate HR(CG/IG) = % CI Highly Significant Multivariate HR(CG/IG) = %CI Not Significant Multivariate HR(CG/IG) = % CI Not Significant Multivariate HR(CG/IG) = % CI Barely Significant N N N

11 Groups Hazard Ratio 95% C.I. CG / IG Age per Year Females/Males HiBAC/LowBAC Refuses/LowBAC Recidivism of Convicted First Offenders After Interlock Removal Roth 6/29/ RSA Conference From T4 CG& IG.spo N

12 Interlocked First Offenders in NM have fewer re-arrests per year of exposure in the years after their first arrest. Roth 6/29/ RSA Conference

13 Roth 6/29/ RSA Conference

14 Roth 6/29/ RSA Conference14 Evidence of Reductions in Drunk Driving Rates in New Mexico

15 Roth 6/29/ RSA Conference15 More Interlocks, Fewer Alcohol-Involved Crashes, Injuries, and Fatalities

16 Roth 6/29/ RSA Conference16

17 Roth 6/29/ RSA Conference17 Overall DWI Recidivism Is Steadily Declining in New Mexico H.R.(2008/2002)= % reduction in DWI Recidivism From Recid by Year.spo

18 Roth 6/29/ RSA Conference18 N(CG) = N(IG) = HR(CG/IG) = % CI =

19 Comments NM Interlocked Offenders Have Less Recidivism in the Six Years After being interlocked. Unmeasured correlates, such as self-selection or judicial discretion, could enhance, reduce, or eliminate the difference in recidivism rates after interlock removal. Other measures, such as publicity, enforcement, prevention programs and a DWI Leadership Group, contributed to the overall reductions in alcohol-involved crashes, injuries, and fatalities. Roth 6/29/ RSA Conference19

20 Roth 6/29/ RSA Conference20 Richard Roth, PhD Executive Director Impact DWI Impact DWI Websites


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