Nick Reese was a prosecutor, and he was the prosecutor with the highest conviction rate in California. So far, he had a conviction rate of 100%.
In the Anglo-American judiciary system, the prosecutor in a criminal case was the equivalent of a public prosecutor in China. They were responsible for the prosecution of public criminal cases. Although persecutors were sometimes translated as public persecutors, their responsibilities were very different from those of public prosecutors in China.
For a prosecutor, the conviction rate equaled the "performance" and "highlights" of their work. The conviction rate would directly affect their future and future career development as a prosecutor. Many politicians in the United States started as prosecutors, and their high conviction rates would build their reputation when they became political candidates.