Carlos Mario Gonzalez Madrid was 26 when he disappeared from Longmont, Colorado. He was last seen at a house in the city on August 16, 2015, after saying he planned to travel to the border and cross back into Chihuahua, Mexico. That is the last verifiable sighting or contact.

Carlos is described as a Hispanic male, about 5 feet 8 inches to 5 feet 10 inches tall, 155 to 175 pounds, with black hair and brown eyes, sometimes wearing a short goatee and mustache. He has a bandlike barbed-wire tattoo encircling one biceps, possibly the right arm. When last seen he wore a white-and-gray striped t-shirt and blue denim pants. He is also known as Carlos Gonzalez and Mario Madrid.

The Longmont Department of Public Safety is handling the open investigation. Few concrete leads have emerged and the circumstances of his stated plan to travel to Mexico remain a key unanswered detail.

If anyone knew Carlos, saw him around August 16, 2015, or has information about his travel plans, please share what you know.