1. The judge slowly took out three gold coins from his pocket.

2. The judge slowly put in three gold coins in/into his pocket.

(Is #2 correct as the opposite meaning of #2? Can we use both 'in' and 'into'?)

3. The public prosecutor accused the criminal, but the lawyer/attorney tried to defend the criminal. What sentence will be made from the judge?

(Did I use the technial terms well? Would you correct errors in the passage? Do I have to add 'public' before 'prosecutor'?)

1. The sentence you provided is correct, and it describes the judge taking three gold coins out of his pocket gradually. However, you mentioned "opposite meaning of #2," but it seems like you are referring to #1 instead. In the context, #1 describes the act of removing the coins from the pocket, while #2 describes the act of placing the coins inside the pocket.

2. Regarding #2, the correct preposition to use is "into." So, the correct sentence would be: "The judge slowly put three gold coins into his pocket."

3. In terms of the technical terms, the word "public" is typically used before the term "prosecutor" to signify that it is a government-appointed role. Therefore, the correct sentence would be: "The public prosecutor accused the criminal, but the attorney tried to defend the criminal."

I made a correction to the use of "lawyer." Since you mentioned "attorney" later in the sentence, it's better to maintain consistency and use "attorney" for both instances. Other than that, the passage appears to be well-written.