UHP last year said they addressed some of Nixon's concerns with Steed, but apparently no formal review was done until Winward undertook it. Fuhr said the Winward review demonstrates Steed always had cause to suspect the person she arrested was impaired or otherwise not supposed to drive. Even in the few cases where the toxicology tests did not reveal drugs, an admission of recent drug use or other suspicious signs could be used as evidence to convict someone of a charge of driving with a controlled substance in their system.