14-year-old suspected hit man on trial in Mexico, The trial is being held under strict security measures. The defendant was transported to the courthouse compound in a military convoy. Because he is a minor, the public is not allowed inside the courtroom in Cuernavaca, Mexico. Only the judge, defense and prosecution attorneys, family members, and a human rights observer are allowed inside. The defendant, known as "El Ponchis" ("The Cloak") is an American citizen who is 14 years old. A video provided to CNN by the Mexican military shows the San Diego native after he was captured near Mexico City in December, as he allegedly was trying to flee. In an on-camera interrogation by Mexican military authorities, the youth admitted to brutally killing people -- the victims all were beheaded. The video shows a military interrogator asking the slim teenager with curly hair several questions. "How many have you killed?" he asks. "Four," responds the accused, who seems calm and collected. "How did you execute them?" "I slit their throats." A YouTube video that circulated last year purportedly showed the teenager beating a man with a two-by-four while the man was tied at the wrists and hanging from the ceiling, as other young people watched. Juan Carlos Castro, a spokesman for the juvenile court holding the trial, says the charges against the teenager go well beyond what he admitted on video. "This teenager is accused by the state attorney's anti-drug unit of crimes related to drug ...