A Mexican man in the United States has pleaded guilty to impersonating a Border Patrol agent and following federal immigration officers to divert them while they were out on immigration enforcement missions in Southern California. Jamie Ernesto Alvarez-Gonzalez admitted Tuesday to following a Border Patrol agent on Jan. 8 while he was driving in a neighborhood in San Diego, according to the U.S. Attorney’s Office for the Southern District of California. He drove a black Ford F-150 truck, a model also used by undercover federal officers. The agent aborted his mission when he saw Alvarez-Gonzalez following him, falsely believing other agents were responding.