Hennepin County Jury Service. Hennepin County District Court " Phone: (612) 540-7436.I have jury duty coming up at the Hennepin County court in Minneapolis. To request to be excused from jury service fill out the Jury Information Form, located at the bottom of the summons, or on-line using eJuror. A brief, enlightening foray into the most universally despised of our civic duties: jury duty. Yep, if you're empaneled twice, you're considered to have complete your service. A grand jury consists of not more than 23 nor fewer than 16 persons, and must not proceed unless at least 16 members are present. Chances are you're going to end up filling out a questionnaire, which the lawyers will use to gauge whether you might be biased. A lot of cases are continued or settled after the jury is empaneled but before any trial actually happens. In a rare move as a result of the incident, Brasel sequestered the jury, which now has 12 jurors and five alternates.