I don't believe Klobuchar was involved in the 2nd trial. Some more information and an excerpt:
A spokesperson for her campaign told AP that Myron Burrell was tried and convicted twice in Tyeshas murder the second time when Klobuchar was no longer the Hennepin County attorney. If theres new evidence, she said, it should be immediately reviewed by the court.
Some information on the case from
Findlaw:
At the conclusion of Burrell's second trial, the district court found Burrell guilty of premeditated first-degree murder, Minn.Stat. § 609.185(a)(1); premeditated first-degree murder committed for the benefit of a gang, Minn.Stat. § 609.229, subd. 2; attempted premeditated first-degree murder, Minn.Stat. § 609.185(a)(1); and attempted premeditated first-degree murder committed for the benefit of a gang, Minn.Stat. § 609.229, subd. 2. The district court found Burrell not guilty of the four counts relating to committing a crime in the course of a drive-by shooting. The court entered a judgment of conviction for premeditated first-degree murder committed for the benefit of a gang, and attempted premeditated first-degree murder committed for the benefit of a gang. The court sentenced Burrell to life plus 60 months in prison for the first conviction and to a consecutive term of 186 months in prison for the second conviction.
Burrell appealed his conviction and sentence.
Yes, Burrell could well be innocent. But that seems to be a problem with our criminal justice system more than a problem with any single prosecutor. Is there any indication that Klobuchar ever deliberately prosecuted a person she believed was innocent?