How much has DNA evidence/profiling reduced crime?

They work by comparing DNA profiles from known offenders with DNA profiles from crime scene evidence. ... read more

Sure, they will question witnesses or potential suspects, but the crime won't see much forensic analysis. And career criminals know this, so it doesn't affect them much. That's why I don't think DNA evidence has had any effect on preventing crime. read more

DNA databases reduce crime rates, especially in categories where forensic evidence is likely to be collected at the scene – murder, rape, assault and vehicle theft. Estimates of the marginal cost of preventing each crime suggest that DNA databases are orders of magnitude more cost-effective than alternatives like hiring police or locking people up longer. read more

DNA databases make it easier for law enforcement to identify offenders in unsolved cases. They work by comparing DNA profiles from known offenders with DNA profiles from crime scene evidence. When a match is made, it is sent to the local law enforcement agency in the hopes that it could point them to a suspect in the case. read more