For what it's worth, conviction rates are not in the high 90%s.
The DOJ has a high conviction rate, at 93%, but Federal cases are the minority of cases in the USA. Most cases are state-level, and the conviction rates vary pretty significantly (E.g., California has a conviction rate of ~65% for property crime: Table 6 of https://www.courts.ca.gov/documents/lr-2019-JC-disposition-o... )
The DOJ has a high conviction rate, at 93%, but Federal cases are the minority of cases in the USA. Most cases are state-level, and the conviction rates vary pretty significantly (E.g., California has a conviction rate of ~65% for property crime: Table 6 of https://www.courts.ca.gov/documents/lr-2019-JC-disposition-o... )