A prosecutor is a lawyer who works on the state, local, or federal level. These attorneys work with law enforcement to help maintain public safety. In this career, your responsibilities include bringing criminal cases to trial, helping to investigate a suspect, attending court proceedings, and creating the legal argument against a defendant. Other duties include charging suspects with crimes, researching cases, interviewing witnesses, preparing witnesses for trial, presenting plea bargains if they are appropriate for a case, proving the defendant is guilty beyond a reasonable doubt, and presenting sentencing recommendations after a defendant receives a conviction.