A different point: most murders are committed by people who are known by the victim, while DNA can reveal connections from strangers. https://www.bjs.gov/index

A different point: most murders are committed by people who are known by the victim, while DNA can reveal connections from strangers. https://www.bjs.gov/index.cfm?ty=tp&tid=941 https://www.bjs.gov/index.cfm?ty=tp&tid=941 > "Stranger" is a classification of the victim's relationship to the offender for crimes involving direct contact between the two. Incidents are classified as involving strangers if the victim identifies the offender as a stranger, did not see or recognize the offender, or knew the offender only by sight. Interestingly, there was a brief period in the US 1990's where over 50% of murders were committed by strangers.