The way you present it, it looks like the FBI changed it "at once" in order to help Biden. Only MAGA simple minds can believe a statistical system can be changed instantly! 😁
1. The final decision to change ghe system was made in 2012, and the transition to the new system started in 2016 and thus occurred mainly under Trump. In 2020, around 50% of the published data was obtained according to this methodology!
2. It has been fully implemented in 2021.
So the 2021, 2022 and 2023 data are fully comparable.
https://ucr.fbi.gov/nibrs/2016
https://en.m.wikipedia.org/wiki/National_Incident-Based_Reporting_System