SPECIAL: Inside Colorado's unsolved cold cases

There are 1,700 active cold cases in Colorado. We revisit four of the biggest unsolved cases in the state's history, from the disappearance of a young teen to a seemingly random shooting spree that spanned an entire summer. Longform reporting: http://on9news.tv/2mAZBU1 JonBenet Ramsey: DNA in Doubt:    • DNA in Doubt, the JonBenet Ramsey case   Previous video: http://bit.ly/2muGNKS Subscribe to NEXT:    / nexton9news   Subscribe to Fix This: http://bit.ly/2g3DsuK Stay connected: 9News Website: http://www.9news.com/ Facebook:   / ilike9news   Twitter:   / 9news   Instagram:   / 9newsdenver   Google+: https://plus.google.com/+9news/posts Snapchat: Denver9NEWS Pinterest:   / 9news