On the Mexican border, crossing points in El Paso, Texas, and San Ysidro, California, handled a third of the traffic.

CNN: U.S. tracks heaviest border-crossing points

The family's locked and abandoned Isuzu Trooper was located February 8, 2010, in San Ysidro, just two blocks from the border.

CNN: Three years later, no sign of missing family

Dorner's ID and some of his personal belongings were found Thursday at the San Ysidro Point of Entry at the U.S.-Mexico border, according to the affidavit.

CNN: LAPD to review firing of ex-cop it's hunting

Noriega Rios was arrested on "administrative immigration violations, " and two days later she was turned over to Mexican authorities at the border crossing in San Ysidro, California, U.S. officials said.

CNN: Alleged Mexican cartel operative 'La Bonita' arrested

Fear of being abducted is forcing a growing number of middle-class and wealthy Mexicans to flee north, leaving behind businesses and moving to places in southern California like San Ysidro or Chula Vista.

FORBES: Kidnap Inc.