The Colorado Bureau of Investigation (CBI) diligently keeps a Cold Case Database to help law enforcement crack the Centennial State's unsolved cases.

The agency understands somebody knows something — and that something might be the key to solving a case.

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Keep reading to see 10 Colorado cold cases with anniversaries in June:

Patricia and Roy Bowden | Homicide

Colorado Bureau of Investigation, Canva
Colorado Bureau of Investigation, Canva
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According to the CBI, 41-year-old Patricia Bowden and her husband, 45-year-old Roy Bowden, were found dead in their Sedalia home on June 7, 1977.

Police believe the couple knew their killer because the home showed no signs of forced entry. Call the Douglas County Sheriff's Office with information.

Simon Amaro | Homicide

Colorado Bureau of Investigation, Canva
Colorado Bureau of Investigation, Canva
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The CBI reports that unknown suspects shot 41-year-old Simon Amaro on June 17, 1980, as he made his way to his vehicle after a night at Richie's Bar in Denver.

Authorities say the incident occurred near the intersection of West 26th Avenue and Federal Boulevard. Contact the Denver Police Department with information.

Cynthia Atterbury | Missing

Colorado Bureau of Investigation, Canva
Colorado Bureau of Investigation, Canva
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The CBI says that 25-year-old Cynthia Atterbury disappeared from Castle Rock on June 27, 1981, and hasn't been seen since.

Police think she may have been with a man named Oscar Joseph McNear and suspect foul play. Contact the Douglas County Sheriff's Office with information.

Patricia Bentley | Homicide

Colorado Bureau of Investigation, Canva
Colorado Bureau of Investigation, Canva
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Authorities report that someone beat 59-year-old real estate agent Patricia Bentley to death in an apartment she was supervising the renovation of on June 10, 1993.

According to the CBI, the apartment was in the 1500 block of East 8th Avenue in Denver. Contact the Denver Police Department with information.

Katherine Allen | Missing

Colorado Bureau of Investigation, Canva
Colorado Bureau of Investigation, Canva
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The CBI notes that 43-year-old Katherine Allen disappeared from the Denver area around June 12, 1996. She has a scar on her right eye and a mole on her right cheek.

Authorities suspect foul play. Contact the Denver Police Department with information.

Dominique Aikens | Homicide

Colorado Bureau of Investigation, Canva
Colorado Bureau of Investigation, Canva
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According to the CBI, 26-year-old Dominique Aikens died in a drive-by shooting in Denver on June 2, 2001.

Police do not have a description of the offending vehicle. Contact the Denver Police Department with information.

Ivan Beaza-Garcia | Homicide

Colorado Bureau of Investigation, Canva
Colorado Bureau of Investigation, Canva
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The CBI reports that a man named Juan Carballo Jr. shot 21-year-old Ivan Beaza-Garcia to death during an altercation outside of a Denver barbershop on June 7, 2003.

The suspect, who also goes by the nickname "Bananas," left the scene in a sport utility vehicle. He is wanted for first-degree murder. Contact the Denver Police Department with information.

Antonio Aguilar-Hernandez and Juan Montoya-Martinez | Homicide

Colorado Bureau of Investigation, Canva
Colorado Bureau of Investigation, Canva
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Employees at a Commerce City business discovered the bloodied bodies of 30-year-old Antonio Aguilar-Hernandez and 27-year-old Juan Montoya-Martinez behind their place of work on June 11, 2012.

According to the CBI, the men died of gunshot wounds. Contact the Commerce City Police Department with information.

Timothy Lee Copley | Missing

Colorado Bureau of Investigation, Canva
Colorado Bureau of Investigation, Canva
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The CBI notes that 57-year-old Timothy Lee Copley disappeared after missing his bus following a meeting at the Warriors Support Center in Colorado Springs on June 20, 2014.

Copley called his girlfriend to tell her he would be home soon but was never seen again. Contact the El Paso County Sheriff's Office with information.

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