Possible Clues:

• Old Western villain
• One who might rob vaqueros in a western
• Old West outlaw
• Foreign criminal having gone back, one had nick closed
• Villain in a sombrero
• The Frito ___ (old ad mascot)
• Many a character in 'The Treasure of the Sierra Madre'
• Frito ___ (old ad symbol)
• South-of-the-border bad guy
• Mexican outlaw