Forensic science has been greatly improved by technology. DNA profiling is one of the technologies that has influenced the effectiveness and credibility of forensic evidence. The FBI began using DNA in one of its cases in 1988. In Europe, the United Kingdom opened a DNA database in 1955 (Milena, 2006). The primary use of DNA is to compare evidence collected at crime scenes with that of suspects. Additionally, it helps establish a link between evidence and criminals. Investigations have been simplified through the use of technology and DNA has been one of the most effective methods of investigation. The use of DNA databases has been to improve the authenticity of evidence by matching on-scene evidence with suspects to ensure that real evidence criminals are convicted and those wrongly accused are exonerated. Databases also determine agencies and other issues that link certain things to crimes already committed. The collected profiles also link primary criminals to serial criminals, based on matching profiles. All three strike laws are mandatory aggravated penalties, which apply to perpetrators convicted of repeated criminal offenses. This ensures that criminals are discouraged from committing repeated offenses. The law began to come into force in the 1990s, after the realization that criminals were less likely to engage in criminal activity again if the sentences were harsh. After the implementation and adoption of the law, cases of delinquency decreased and, over the years, recidivism decreased. The application of technology and new laws have improved the justice system and ensure that justice is easily obtained. For this reason, ...... middle of paper ......kes and you are out » Sentencing laws? Journal of Quantitative Criminology, 17 (3), 227-246Gabriel, MN, Huffine, EF, Ryan, JH, Holland, MM and Parsons, TJ (2001). Improved mtDNA sequence analysis of forensic remains using a mini-primer set amplification strategy. Journal Forensic Science, 46(2), 247-253.Milena, D. (2006). DNA in forensic medicine. Hemijski pregled, 47(4), 89-91. Ogden, R. (2008). Fisheries Forensics: Using DNA tools to improve compliance, traceability and enforcement in the fishing industry. Fish and Fisheries, 2 (4), 462-472. Woolfe, M. and Primrose, S. (2004). Food forensics: using DNA technology to combat misdescriptions and fraud. Trends in Biotechnology, 22, (5), 222-226. Zimring, F.E., Kamin, S. and Gordon, H. (2003). Punishment and democracy: three strikes and you're out in California. New York, New York: Oxford University Press.