On December 26, 2013, Denver police responding to what was initially reported as a burglary at 1969 Trenton Street found two men shot to death inside the home. Victims were 37-year-old Alexander Tower, who suffered a gunshot wound to the head, and 39-year-old Francisco Gutierrez, who had multiple gunshot wounds. Authorities say the two were last seen together in the early morning hours of December 22 at a downtown Denver nightclub.

Police treated the deaths as a double homicide and told the public they believed the incident was isolated rather than the work of a random killer. Investigators issued a crime alert and offered a reward for information, but by early 2014 reported no significant breaks and described the probe as very open. No arrests or public identifications of suspects have been announced, and the case has since gone cold.

If anyone knew Alexander’s movements or his contacts in late December 2013, or has information about who was in the Trenton Street home, please share what is known.