A Wethersfield man pleaded guilty in Hartford federal court Wednesday to one count of wire fraud stemming from an investment scheme that defrauded a dozen individuals and couples of nearly $900,000 over an eight-year period.

As part of the scheme, 53-year-old Anthony G. Sciarra falsely promoted himself as a bona fide insurance agent and financial adviser, authorities said. Sciarra, according to the Office of the U.S. Attorney for Connecticut, solicited investments from various victims with promises of high annual returns ranging from 4 to 12 percent or more. He did so through AGS Financial and later through an entity he owned called Westport Enterprises.