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Council questions DPD on field sobriety tests and how marijuana impairment is assessed
Summary
Committee members asked Detroit Police Department officials to clarify how officers establish probable cause for impairment, whether field sobriety tests and breath tests are used differently for alcohol and marijuana, and requested follow-up guidance the public can use.
Detroit Police Department training officials told the Internal Operations Committee on Monday that officers use a sequence of steps to evaluate suspected impaired driving and that the emphasis in enforcement is on impairment, not on the specific substance.
Captain Shell, Detroit Police Department training, told committee members that officers "will go through a field sobriety test, and then to gain further information on that particular suspicion, yes, a breath test can be ordered." The captain stressed that officers take sequential steps to…
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