Saying she still has no idea who sent her a box of dead fish, former top homeland security bioweapons official Maureen McCarthy says she has resigned from the department and begun legal action to clear her name. Occasionally breaking into tears during a 45-minute telephone interview, McCarthy called her resignation "involuntary" and said she had suffered severe financial distress since being suspended without pay in February over the incident. "I resigned against my will," she said. "I had no income, and I couldn't use my accrued annual leave" for cash. "By resigning I got that back," she said, and could...