A fifth Teamsters union member was arrested Thursday, facing charges of intimidating a TV crew that was filming in Boston last year.
Michael Ross, of Billerica, is being charged on federal extortion charges, according to an indictment.
Prosecutors allege that five men in Teamsters Local 25 threatened the crew of "Top Chef" for using non-union workers when it filmed locally.
The four others -- Mark Harrington, 61, of Andover; John Fidler, 51, of Holbrook; Daniel Redmond, 47, of Medford; and Robert Cafarelli, 45, of Middleton -- pleaded not guilty to extortion charges Wednesday.
The Local 25 president previously called the accusations "fiction at best."
Originally, Richard Jeffrey was indicted with the other four men Wednesday, but the U.S. attorney's office announced late Wednesday that charges against him were dropped, saying he had been misidentified.