john archanuhu was accused of prescribing hundreds of thousands of painkillers. prosecutors abandoned the case siting key witness problems. he pleaded not guilty to another charge. the doctor's son told us his dad is tieing to practice again. police and city leaders still need residents to open up about crime so they can close unsolved murder cases like the one at this scene. police say they're looking for leads in at least seven unsolved murders from the past 6 years. one city commissioner said she blames prosecutors. >> stop the silence. stop the violence. >> commission er velma williams said the problem is not only the number of people killed in the community but the number of people unwilling to come forward with vital information that could give their neighbors closure. >> someone knows what happened to my son and who murdered him and everything. >> carlton edge is the commissioner's brother and father of dennis williams who have shot dead in february of 2010. his family has never gotten closure even though police say they have an idea who could be responsib