Years after her childhood best friend was murdered, Selina Maestas sat outside the suspected killer's home. Maestas watched silently as Mario Raymond Sanchez walked in and out of the small, tan brick house on a residential street in Commerce City, observing from afar as he continued living his life...while her friend's life had ended.

Even now, investigators accuse Sanchez of murdering Alicia Marie Tverberg . He was arrested in connection with the crime in January 2020, a month after the 21-year-old woman was found fatally shot inside a stranger's Adams County apartment the day after Christmas 2019. But Sanchez was never charged with Tverberg's death, nor were any other suspects.

Almost six years later, Tverberg's case has gone cold .

"To this day, I have not been able to rest. I re

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