UCR could not answer the prevalence rate of violent victimization of both males and females because it omits some police records; on the other hand, NCVS could not answer whether victims were more likely to report to the police for property crimes or violent crimes in 2013. This is because most people are not ready to disclose their identity. Official data, such as UCR arrest data, has a particular set of issues. For the most part, most offences are not reported to the authorities and only a limited percentage of those reported result in detention. Increases or reductions in records or convictions for such crimes, such as robbery or self-theft, can also result in significant variations in results and false assumptions about patterns in crime.
The UCR has some capabilities in making results accessible to the public within a year regardless of the population. It positions actual statistics on crime in a consumable format. The historical perspective of crime can be observed. It illustrates how culture has experienced violence over the years. It is a consistent and national sample and tracks murder and arrests. Many of the drawbacks are that it mainly includes the police's crime and is not the most accurate material ( Ansari et al, 2017) . It's not 100% right. Changes to the local policy will lead to spikes in details. The data are being published slowly. The drawbacks in the UCR are that it omits offences not reported to the police, omits much of the use of drugs, and includes reporting mistakes.
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The strengths of NCVS are that can catch more crime than can be reported in police reports. The NCVS uses larger offending behaviour surveys, similar to the National Longitudinal Youth Survey and other broad self-report surveys. The drawbacks are that the NCVS asks too little about the characteristics of suspects ( Walsh & John P, 2017) . Interviewees are interviewed about the age, race, sex and number of offenders and their offender relationship. Prosecutions of the criminals may provide much more accurate details about the perpetrator.
References
Ansari, S., & He, N. (2017). Explaining the UCR-NCVS convergence: A time series analysis. Asian Journal of Criminology , 12 (1), 39-62.
Walsh, J. P. (2017). Measuring Delinquency. The Encyclopedia of Juvenile Delinquency and Justice , 1-5.
