Summary: Alonzo Thomas was gunned down at a friend's house when he stepped outside to take a phone call four years ago. He left behind two children, including one he never met. His mother, Monique, says she will never give up the search for his killer. About 40 percent of the murder cases in Kansas City are unsolved. Many of those cases are considered cold. FOX4 Crime Files takes an in-depth look at some of these cases, each one representing a life lost, and loved ones searching for answers.
