There began a rand study and other studies that led to the funding of research by the Law Enforcement Assistance Administration which new information and proposals led to the methods used to investigate past crimes. These new guidelines and suggestions offered new recommendations in Managing Criminal Investigations (MCI). First, this research allows the patrol officers to have more investigative responsibilities something that they did not have previously. Secondly, by including solvability factors along with managing criminal investigation, the screening of cases, case management, and the police and the prosecutor working together to solve crimes. The solvability factors are the determining factor if the case should be considered for a follow-up
