David was last seen in Burbank, California on April 17, 1993. He was abducted by his non-custodial mother, Norma Alicia Marko. An FBI warrant was issued for her on February 18, 1994. Norma may use the alias last names Diaz, Garcia, Garza and/or Limon. She has a brown birthmark under her left breast, and she wears eyeglasses. Norma and David may be in Mexico and may travel between Houston, Texas and the Mexican border in Laredo, Texas. David has a birthmark on the inside of his left thigh.