Anna-Sigga Nicolazzi is a former prosecutor for the Brooklyn District Attorney's Office, one of the country’s largest and busiest offices. Before her departure in 2017, she served as Chief of Trials for the Homicide Bureau. Early in her career, Nicolazzi climbed the ranks to reach the elite Homicide Bureau, where she specialized in complex cases for 16 of her 21-years in office. During her tenure, Anna-Sigga tried over 50 felony cases, including 35 homicide cases. ​ Notable cases tried by Anna-Sigga Nicolazzi include the murder of Hunter College student Ramona Moore, the targeting and murder of Michael Sandy, the shooting death of New York City Police Officer Russel Timoshenko, and the murder of ABC news radio personality George Weber. Nicolazzi's cases and prosecutorial style have been profiled in local and national news outlets, including The New York Times, New York Magazine, and Vanity Fair. She has frequently appeared as a legal analyst on multiple networks, notably FOX, ABC, CBS, CNBC, and HLN. Her appearances as a legal expert on broadcast television eventually lead to her transition to a media career.

Since 2017, Anna-Sigga has hosted Investigation Discoveries’ True Conviction. Now, in its third season, True Conviction explores the real-life stories of how homicides are solved on the street but won in the courtroom.

In 2020, Nicolazzi launched the true-crime podcast, Anatomy of Murder, a weekly podcast examining homicide cases and paths to justice for the victims. Anna-Sigga Nicolazzi teams up with Emmy award-winning investigative journalist and former Deputy Sheriff Scott Weinberger to take listeners behind the scenes for an insider’s perspective of compelling homicide cases from around the country.

Anna-Sigga also co-hosted Investigation Discovery’s six-part series, Did He Do It with Darren Kavinoky, in 2015. For the past six years, she has served on the faculty of Harvard Law School’s Trial Advocacy Program. She has also lectured locally and nationally and participates in multiple professional associations.

Podcaster, Investigative Journalism, Law, Lawyers Social Justice, Television Personalities, TV Host, Radio Hosting, Hosts & Emcees,