Justice Department to sue Arizona sheriff after talks fall through

The Justice Department is preparing to sue Arizona Sheriff Joe Arpaio, known internationally as "America's toughest sheriff," saying talks between the two sides have fallen through.

The Obama administration and Arpaio's Maricopa County Sheriff's Office had been in the midst of settlement talks, after the Justice Department accused it of systematically discriminating against Latinos.

As part of the settlement, the department wanted Arpaio to allow an independent monitor to oversee reforms at his office. The Justice Department called it a "key, non-negotiable requirement."