The Rand study was a report from the RAND Corporation in 1975 on criminal investigation process by Peter W Greenwood and Joan Petersilia the rand report was very conservative in that it found that most of the detectives work was spent on work that did not lead to direct involvement in solving crimes. According to our book The Police “The Rand reports said that half of all detectives could be replaced without negatively influencing crime clearance rates.” The Rand Criminal Investigation Study: Its Findings and Impacts to Date by Peter W Greenwood he wrote that “We suggested that patrol officers be given a larger role in conducting preliminary investigations, both to provide an adequate basis for case screening and to eliminate the need for