In the U.S., civil cases are litigated by opposing attorneys in front of a judge, often without a jury, which differs from criminal cases led by prosecutors. Prosecutors (e.g., local DAs, AGs, DOJ) handle criminal trials, not civil ones like (usually) IP infringement.

If people are exploiting your work unfairly, it's on you to take legal action in civil court. Just be aware the statute of limitations is short (often 1-4 years depending on the state), so consult a real attorney quickly. (I'm not a lawyer, so this isn't legal advice!)