KANSAS CITY, Mo. (AP) — A Kansas City man has been sentenced to 30 years in federal prison for leading what prosecutors call one of the largest cocaine trafficking rings in the metro area.

The U.S. Attorney’s office said Wednesday that 37-year-old Alejandro S. Corredor is the last of more than a dozen defendants sentenced as a result of an investigation dubbed Operation Blockbuster.

Prosecutors say the investigation uncovered evidence of an organization that was smuggling millions of dollars of cocaine from Mexico to distribute in Kansas City.

Corredor is a citizen of the South American nation of Colombia. He pleaded guilty in July 2010 to leading the conspiracy. He also admitted involvement in plans to assassinate two men in the Kansas City area. One of the men was wounded; another died.