Minneapolis police officers have repeatedly requested over the past three years that Hennepin County medical responders sedate people using the powerful tranquilizer ketamine, at times over the protests of those being drugged, and in some cases when no apparent crime was committed, a city report shows. On multiple occasions, in the presence of police, Hennepin Healthcare EMS workers injected suspects of crimes and others who already appeared to be restrained, according to the report, and the ketamine caused heart or breathing failure, requiring them to be medically revived.