BROOKLYN - The defeat of a 23-year incumbent in the Democratic primary race for Brooklyn district attorney sent shockwaves throughout the borough.

Ken Thompson defeated Charles Hynes to become the first African-American Democratic nominee for Brooklyn DA.

Hynes had already secured the Republican bid for the November election, but a spokesperson for district attorney says he won't be actively campaigning. He says that Hynes will be working with Thompson to transition the job over to him over the next few months.

Assemblyman Dov Hikind, who is a Thompson supporter and former federal prosecutor, says he's just what Brooklyn needs.

Thompson, 48, is a former federal prosecutor who won the nomination with 55 percent of the vote.