hargrove says overloaded homicide detectives need more manpower and training.ere police dollars get spent. >> unfortunately, in a great many places, insufficient resources are being applied because of the political decision on how much effort shall be made in these kinds of times. >> without those resources, hargrove says, murders will go unsolved and the result is a devastating spiral. if the cops are not solving murders, potential witnesses do not feel safe enough to speak up , and killings continue. >> murder begets murder, especially unsolved murder. >> you had tremendous success closing homicides at a rate i think better than the national average. what is the secret? >> one thing i truly believe helped in our successes that we had relationships in communities in which we work. >> dr. cedric alexander was chief of police in dekalb county, georgia, and later became a law enforcement analyst for nbc news. he said solving murders has to involve cooperation between police and citizens. what is needed is the kind of connection that seemed to be missing in courtn