Testimony continued Monday.
Named as defendants are the Lamb County district attorney, the Texas Ranger who investigated the 1996 slaying of a Littlefield convenience store clerk, a police officer, Littlefield and the county.
The two, who were in the country legally, were sentenced to life imprisonment in 1998. In 2008, the Texas Court of Criminal Appeals overturned their convictions, citing ineffective counsel, and ordered new trials. A grand jury declined to re-indict, but the district attorney says they're not acquitted.