Law office of Brodsky & Smith, LLC announces that it is investigating potential claims against the Board of Directors of Square 1 Financial, Inc. for possible breaches of fiduciary duty and other violations of state law in connection with the sale of the Company to PacWest Bancorp . Click here to learn more about the investigation http://brodsky-smith.com/896-sqbk-square-1-financial-inc.html , or call: 877-534-2590.