Nearly half of all murder cases in the United States go unsolved, with a national clearance rate of 58% in 2023, as reported by the FBI. In comparison, countries like Australia, Britain, and Germany have clearance rates ranging from 70% to 90%. The shortage of resources, high case volume, prevalence of guns, gang-related crimes, and community distrust of police are cited as factors contributing to the lower likelihood of solving murders in the US. Experts recommend increasing resources for investigations and implementing new technology, such as surveillance cameras, to help improve clearance rates. (Newser)