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Bill

HB 1486

Motor Vehicles - Accidents - Required Testing for Impaired Driving (Mateo's Law)

2025 Regular Session Introduced by Nick Allen

Maryland bill requiring mandatory impaired driving tests for all motor vehicle accidents to detect and prevent drunk/drugged driving incidents.

First Reading House Rules and Executive Nominations
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Bill Summary · HB 1486

Legislative bill overview

HB 1486, known as "Mateo's Law," requires mandatory testing for impaired driving in motor vehicle accidents. The bill expands the circumstances under which drivers involved in accidents must submit to chemical testing (breath, blood, or urine) to determine impairment levels, regardless of whether an arrest has been made.

Why is this important

This legislation directly affects accident investigation procedures and could increase detection of impaired driving, potentially preventing future accidents and fatalities. It also raises questions about constitutional protections against warrantless searches and the scope of testing authority in accident investigations.

Potential points of contention

  • Fourth Amendment concerns: Mandatory testing without arrest or warrant may constitute an unreasonable search, potentially conflicting with constitutional protections
  • Implementation costs and logistics: Law enforcement agencies would need resources, training, and equipment to conduct immediate testing at all accident scenes
  • False positives and accuracy: Medical conditions, medications, and food can produce false positive results; mandatory testing may generate unreliable evidence
  • Scope ambiguity: Unclear whether all accidents trigger testing or only those meeting specific severity thresholds, and whether consent is required

Compiled from official sources — confirm details with the bill’s official record.

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