An escaped California inmate is now wanted for killing a Mexican police commander who hunts down foreign fugitives -- also known as a "gringo hunter" -- during a shootout in Tijuana, officials said. Abigail Esparza Reyes,

Members of security forces work near a crime scene where a U.S. citizen shot and killed Abigail Esparza Reyes, 33, a top Mexican state police officer in an elite unit known as the "Gringo Hunters", which tracks and arrests U.