When Erin Callan, Lehman Brothers' onetime golden girl, left the firm in July, it was a tumultuous end to what had been a stellar 13-year run.
She'd risen from tax lawyer to investment banker to a six-month stint as CFO - and was then thrown under the bus by her mentor, CEO Dick Fuld, as Lehman's share price tanked and rumors swirled about the firm's imminent demise.