How is DNA profiling useful in forensics?

DNA profiling is a powerful tool in forensics because it provides a unique genetic fingerprint that can be used to identify individuals with a high degree of accuracy. Each person's DNA is distinct, with the exception of identical twins, making it an ideal method for matching biological evidence found at a crime scene to a suspect. This technique examines specific regions of the DNA that vary significantly among individuals, allowing forensic scientists to create a profile that can be compared against profiles stored in databases or samples taken from suspects or victims.

The value of DNA profiling in forensic investigations lies in its ability to confirm or exclude individuals as potential suspects based on biological evidence, such as blood, hair, or other bodily fluids. This helps law enforcement not only in apprehending the right individuals but also in exonerating those wrongfully accused.

In contrast, other options do not align with the primary function of DNA profiling. Predicting criminal behavior, determining the time of death, and analyzing handwriting samples are all important aspects of forensic science, but they do not utilize DNA in the same way that profiling does, which focuses specifically on genetic identification. Thus, DNA profiling stands out as a fundamental technique in modern forensic investigations.