BOSTON -- A Boston law firm has agreed to represent the state for free as Gov. Mitt Romney seeks to remove Matthew Amorello as chairman and chief executive officer of the Massachusetts Turnpike Authority following the death this week of a turnpike motorist. WilmerHale -- the entity resulting from the merger of Hale & Dorr of Boston and Wilmer Cutler & Pickering of Washington -- has agreed to represent the state on a pro bono basis, according to Eric Fehrnstrom, the governor's communications director. Amorello is expected to be represented by the Turnpike Authority. A WilmerHale spokeswoman was researching the...