The database is immaterial to the acquittal or exclusion of non-offenders. Where a primary suspect has been identified, a DNA profile ought to be created and compared to the crime scene data. Likewise, where suspicions persist concerning the guilt or innocence of a convicted individual, a sample of DNA can be taken. The database has predominant application in 'non-suspect' cases, and not the circumstances where the suspect or felon is already identified. It is also important to keep claims regarding the efficacy of DNA matching in context, Chief Constable Sims of the British Metropolitan Police stated that of '4.9 million crimes reported each year, of which 1.3 million are 'detected' (lead to charges)' only 33,000 involve DNA matching1. 1 Home Affairs Committee. (2010, March 4). The National DNA Database. Retrieved May 19, 2011, from UK Parliament: