Federal prosecutors Thursday accused a contractor of lying under oath in the public corruption case of former state Sen. Thomas Bromwell.

James B. Digman, 62, of Forest Hill, is accused of giving false testimony to a federal grand jury that concealed Bromwell?s relationship with Poole and Kent Co., a mechanical contracting firm whose president pleaded guilty in a scheme prosecutors allege was so profitable he offered Bromwell $80,000 a year to postpone retirement.