A spokesman for the Cheyenne Police Department says detectives have not given up on solving a 2015 double homicide that claimed the life of a Cheyenne business owner and another man.

But Sgt, David Janes says there haven't been any significant new developments in the case recently either.

The murders happened on July 20, 2015, just as large crowds were circulating through downtown Cheyenne following a Cheyenne Frontier Days Pancake Breakfast. Police were called to The Coin Shop at 510 West Lincolnway a little after 9 a.m. on a report of an armed robbery. Officers arriving at the business found 67-year-old Dwight Brockman and 76-year-old George ''Doc'' Manley had been shot to death.

Brockman owned the business, while Manley was a frequent customer.

In the months and years following the killings, police say they conducted an extensive investigation, serving at least 18 search warrants, interviewing over 100 people and seizing over 200 pieces of evidence. Cutting-edge forensic technology was also used to identify DNA from the crime scene, and police released a sketch of a suspect not long after the killings. Thousands of dollars in reward money for information on the case was also offered and went unclaimed.

Despite all of those efforts, no arrests were ever made in connection with the killings and the case remains an open one. Janes said Thursday that police still occasionally get tips about the murders and continue to follow up on any available information.