1. INTERLOCKED DWI OFFENDERS HAVE LOWER CUMULATIVE RECIDIVISM FOR SIX YEARS AFTER INSTALLATION 2010 RSA Conference Richard Roth, PhD Impact DWI and PIRE Roth 6/29/201012010 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 6/29/20102010 RSA Conference

3. Roth 6/29/20102010 RSA Conference3 More and More Interlocks Are Being Used To Reduce Drunk Driving

4. The New Mexico Laws 1999-2002 Optional Judicial Mandate for 2 nd and 3 rd DWI 2003-2005 Mandatory Judicial Program for 1 st Aggravated and All Subsequent Offenders 2003-2010 Indigent Fund (Judges Decide) 2003- Administrative Program: Ignition Interlock License available for all revoked offenders with no waiting period 2005- 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. 2005- Revocation periods increased 2009- Mandatory Interlock before unrestricted license 2010- Objective Standard for Indigency 4Roth 6/29/20102010 RSA Conference

5. Roth 6/29/20102010 RSA Conference5 12,005

6. Roth 6/29/20102010 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. (2003-2009) 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 6/29/20102010 RSA Conference7

8. Roth 6/29/20102010 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 5026 382 N 11,493 2910 N 5306 1019 (22 day shift) (36 day shift) (29 day shift) (32 day shift) From 100530.spo

9. Roth 6/29/20102010 RSA Conference9 Recidivism of Convicted Offenders While Interlocks Are Installed From 100530.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 6/29/20102010 RSA Conference10 Recidivism of Convicted Offenders After Interlock Removal Multivariate HR(CG/IG) = 1.14 95% CI 1.05-1.23 Highly Significant Multivariate HR(CG/IG) = 1.09 95%CI 0.96-1.23 Not Significant Multivariate HR(CG/IG) = 0.90 95% CI 0.73-1.11 Not Significant Multivariate HR(CG/IG) = 0.71 95% CI 0.52-0.98 Barely Significant N 8869 1946 N 3751 556 167 3478 N 27696 7649

11. Groups Hazard Ratio 95% C.I. CG / IG1.141.05-1.23 Age per Year0.9730.970-0.975 Females/Males0.750.70-0.80 HiBAC/LowBAC1.401.33-1.48 Refuses/LowBAC1.361.25-1.48 Recidivism of Convicted First Offenders After Interlock Removal Roth 6/29/2010112010 RSA Conference From 100528 T4 CG& IG.spo N 27696 7649

12. Interlocked First Offenders in NM have fewer re-arrests per year of exposure in the years after their first arrest. Roth 6/29/2010122010 RSA Conference

13. Roth 6/29/2010132010 RSA Conference

14. Roth 6/29/20102010 RSA Conference14 Evidence of Reductions in Drunk Driving Rates in New Mexico

15. Roth 6/29/20102010 RSA Conference15 More Interlocks, Fewer Alcohol-Involved Crashes, Injuries, and Fatalities

16. Roth 6/29/20102010 RSA Conference16

17. Roth 6/29/20102010 RSA Conference17 Overall DWI Recidivism Is Steadily Declining in New Mexico H.R.(2008/2002)= 0.62 38% reduction in DWI Recidivism From 100625 Recid by Year.spo

18. Roth 6/29/20102010 RSA Conference18 N(CG) = 43794 N(IG) = 10318 HR(CG/IG) = 1.089 95% CI = 1.025-1.157

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 6/29/20102010 RSA Conference19

20. Roth 6/29/20102010 RSA Conference20 Richard Roth, PhD Executive Director Impact DWI RichardRoth2300@msn.com Impact DWI Websites www.ImpactDWI.org.www.PEDAforTeens.org www.AlcoholTaxIncrease.org www.RothInterlock.org