DNA helped make investigating crimes more faster, because DNA is the evidence on who did the crime. DNA evidence has helped identify who the suspect is in sexual violence or rape. The police use either fingerprints or blood from the person who was killed to get the DNA of the suspect, because when the criminal kills somebody that is close to them they usually use a knife and stab them, and when they did they either cut themselves. So it would be easy for investigators to find out who was the suspect by using the blood and match DNA in the criminal's database. Each person carried a genetic fingerprint in his or her DNA, so every person could be identified solely by the sequence of their base pairs. Instead, scientists are able to use a shorter method due to repeating patterns in the DNA. These patterns do not, however, give an individual "fingerprint," but they are able to determine whether two DNA samples are from the same person, related people, or non-related people. This is called DNA fingerprinting or profiling. So with DNA evidence it makes it alot more easier to find the suspect and without it, police would take long to figure out whos the suspect and perhaps might not even find the suspect and fail in criminal justice, since evidence is important for crimes.
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