This past Valentine's Day, Grizzell would have been 37 and Kunselman 36.

It's been 21 years since the tragic deaths of Stephanie Hart-Grizzell, 16, and her boyfriend, Nick Kunselman, 15, who were both found shot to death at the Subway on Coal Mine Avenue after his midnight shift on February 14, 2000. In hopes to bring about justice, and more importantly, answers for the grieving families, authorities have increased the reward for information in the case to $100,000.

This past Valentine's Day, Grizzell would have been 37 and Kunselman 36.

Police were hopeful that the case would be solved quickly and the perpetrator(s) would be brought to justice, but after leads fizzled out and confessions were found to be false, over 20 years later, it remains a cold case. According to Denver7Jefferson County Sheriff Jeff Shrader is hopeful with the passage of time and the increase in reward money, people will come forward now.

"With this significantly increased reward, people who haven't come forward with their information will be much more likely to do so now. We are continuing our diligent work to bring justice to Nicholas and Stephanie," Shrader said.

If you have information about the murders of Grizzell and Kunselman, please contact the Jefferson County Sheriff's office at (303)-271-5606 or the Colorado Bureau of Investigation at (303)-239-4300.

Do you remember this tragic news story? Share your wishes and prayers with the families in the comments.